Netflix’s Korean thriller ends with an impossible phone call. But if Young-sook was already erased from the future, who made the call that saved her?
Warning: Major spoilers for The Call (2020), including its mid-credits scene.
For most of The Call, the rules seem simple.
A woman living in 2019 can speak by telephone to another woman living in 1999.
What happens in the past changes the present.
Save a life in 1999, and someone who was dead in 2019 may suddenly be alive.
Commit a murder in 1999, and a person who existed in 2019 may disappear.
The film builds an increasingly terrifying story around that premise.
Then, in its final minutes, it introduces a new possibility.
Young-sook calls herself.
Her older self warns her younger self about an approaching confrontation, allowing her to survive an encounter that appeared to have killed her.
The consequences are devastating.
Seo-yeon’s mother disappears from the future, and the film reveals that Seo-yeon has become Young-sook’s captive.
But the twist creates a serious logical problem.
The audience has already watched the older Young-sook vanish when her younger self falls.
If Young-sook was erased from the future, how could she later make the call that prevents her erasure?
Is the ending a time-travel paradox?
Does it secretly reveal a branching timeline?
Or does the film simply prioritize one last shocking reversal over its established rules?
Our interpretation: The Call’s final phone call can be explained through an overlapping-timelines theory, but the movie does not establish that theory as a confirmed rule. The paradox is real, and the ambiguity matters.
Let’s reconstruct the evidence.
1. What Happens in The Call?
Directed by Lee Chung-hyeon, The Call stars Park Shin-hye as Kim Seo-yeon and Jeon Jong-seo as Oh Young-sook.
Seo-yeon returns to her childhood home in 2019.
She discovers an old cordless telephone that connects her to Young-sook, who occupies the same house twenty years earlier.
At first, their conversations seem miraculous.
Seo-yeon knows things that have not yet happened in Young-sook’s world.
Young-sook can intervene in events that shaped Seo-yeon’s childhood.
The women initially help each other.
Young-sook prevents the fire that killed Seo-yeon’s father.
Seo-yeon warns Young-sook that her adoptive mother intends to kill her during an exorcism.
But this exchange creates a catastrophe.
Young-sook survives, kills her adoptive mother, and begins murdering other people.
Seo-yeon discovers that changing the past can make the present worse.
Eventually, Young-sook uses Seo-yeon’s younger self as leverage.
The telephone, which once promised a way to repair the past, becomes a weapon.
2. The Film’s First Rule: Changing the Past Changes the Present
The most important rule is demonstrated early.
Young-sook prevents the fire that originally killed Seo-yeon’s father.
Seo-yeon’s surroundings change.
Her family circumstances improve.
The house transforms.
Her memories and physical reality become entangled with a revised history.
This establishes the central mechanism.
Actions in 1999 can rewrite conditions in 2019.
The characters do not merely receive information about an alternate world.
They experience the consequences of a changed past.
That distinction matters.
If the film had established completely separate, noninteracting universes from the beginning, its ending would be easier to explain.
But its most dramatic scenes emphasize a present that changes as the past is altered.
The audience is encouraged to think in terms of cause and effect.
A decision in the past produces a new reality in the future.
3. The Second Rule: People Can Disappear When Their Histories Change
Young-sook’s murders demonstrate another consequence.
When she kills someone in the past, that person’s existence in Seo-yeon’s present can be erased.
The film repeatedly uses these changes to create horror.
A person may disappear.
A room may change.
Evidence may be rewritten.
Seo-yeon cannot rely on the stability of her surroundings.
This creates a terrifying imbalance.
Young-sook possesses the ability to act in the past.
Seo-yeon possesses information about the future.
Each can threaten the other’s reality.
But Young-sook eventually realizes that physical control over the past gives her a particularly brutal advantage.
She can kill someone before Seo-yeon has any opportunity to protect them.
The audience therefore learns to interpret disappearance as evidence of a changed history.
That lesson becomes essential in the final confrontation.
4. Why Does Young-sook Become So Powerful?
Young-sook’s greatest advantage is not the telephone itself.
It is her willingness to use violence.
Seo-yeon initially treats the connection as an extraordinary opportunity to correct tragedy.
Young-sook increasingly treats it as a means of controlling people.
When she discovers that Seo-yeon can investigate future events, she demands information.
She wants to know when she will be arrested.
She wants to know how to avoid capture.
When Seo-yeon resists, Young-sook threatens her family.
The telephone turns future knowledge into a resource that can be extracted through intimidation.
This is one of the film’s most disturbing ideas.
Information about the future does not automatically create freedom.
In the hands of someone willing to murder, it can become an instrument of domination.
Young-sook does not need to understand every philosophical consequence of time travel.
She only needs to discover which actions give her power.
5. What Happens During the Original Final Confrontation?
The climax unfolds across two periods.
In the past, Seo-yeon’s mother, Eun-ae, arrives at the house while searching for her missing family.
A police officer accompanies her.
Young-sook kills the officer and threatens Eun-ae.
In 2019, the older Young-sook confronts Seo-yeon in the same house.
The two conflicts unfold simultaneously.
Seo-yeon communicates with her mother through the telephone and urges her to fight.
In the past, Eun-ae struggles with Young-sook.
She pushes Young-sook over the railing, and both fall.
In the future, the older Young-sook disappears before she can kill Seo-yeon.
The house changes.
The immediate threat is gone.
Seo-yeon later reunites with her mother.
At this point, the audience is encouraged to conclude that Young-sook’s death or defeat in the past has eliminated her future existence.
It appears that the story has reached a happy ending.
Then the credits begin.
6. The Mid-Credits Scene Changes Everything
The film reveals another telephone conversation.
An older Young-sook calls her younger self.
She warns her about the impending arrival of Eun-ae and the police officer.
She tells her younger self to keep the telephone close.
The warning gives Young-sook advance knowledge of the confrontation.
The film then shows that the younger Young-sook survives the fall.
Her eyes open.
The apparent victory is undone.
In 2019, Eun-ae disappears while walking beside Seo-yeon.
The final image reveals adult Seo-yeon restrained in Young-sook’s captivity.
Young-sook has apparently rewritten history in her own favor.
The twist is chilling.
But it raises the central question.
Where did the older Young-sook who made that call come from?
7. The Problem: We Already Saw Older Young-sook Disappear
Consider the order in which the audience receives information.
First, Eun-ae pushes the younger Young-sook over the railing.
Second, the older Young-sook vanishes from 2019.
Third, Seo-yeon reunites with her mother.
Fourth, the film reveals that the older Young-sook warned her younger self.
If these events are interpreted as one continuous sequence, the fourth step is difficult to reconcile with the first three.
Young-sook’s future existence appears to have been erased.
An erased person should not be able to place a telephone call.
And yet the ending depends on that call.
This is not a minor question about an unexplained technological device.
It concerns the film’s basic causal structure.
The older Young-sook must exist to warn the younger Young-sook.
But the younger Young-sook must survive for the older Young-sook to exist.
Each event appears to depend on the other.
That is the paradox.
8. The Simplest Explanation: The Call Happened Before Young-sook Disappeared
One explanation is that the mid-credits scene is not occurring after the apparent happy ending.
It is showing an earlier event.
The older Young-sook may have made the warning call before her final confrontation with Seo-yeon.
The audience simply does not learn about it until later.
This is an important distinction.
The order in which a film reveals scenes is not necessarily the chronological order in which the events occurred.
Under this interpretation, Young-sook was still alive in 2019 when she placed the call.
She warned her younger self.
The younger Young-sook received the warning before confronting Eun-ae.
The later change in history eventually produces the darker ending.
This explanation removes the most immediate impossibility.
An erased person does not have to make a call after being erased.
But it does not solve every problem.
9. Why the Earlier-Call Explanation Is Not Enough
If the older Young-sook already warned her younger self before the confrontation, why does the future initially change as though Young-sook had been eliminated?
Why does Seo-yeon experience a reunion with her mother?
Why does that reunion later disappear?
A simple model in which the past immediately determines a single fixed future struggles with this sequence.
Once the warning is delivered, the altered past should already be part of the resulting history.
Yet the film shows what appears to be an intermediate outcome.
First, Young-sook disappears.
Then the future changes again.
The earlier-call explanation therefore solves the question of when the telephone conversation could occur.
It does not fully explain how the competing outcomes can appear in succession.
For that, we need another hypothesis.
10. The Branching-Timeline Theory
A popular way to interpret the ending is to imagine that changes to the past produce distinct timelines.
Under this theory, the film’s events can be divided into several versions of reality.
One timeline contains the original history in which Young-sook dies at the hands of her adoptive mother.
Another contains the history in which Seo-yeon warns Young-sook and enables her survival.
A later version contains the confrontation in which Eun-ae apparently defeats Young-sook.
The final version contains the warning from older Young-sook that enables her younger self to survive.
This model explains why the audience sees more than one outcome.
The happy ending is not necessarily false.
It may be real within one version of history.
The darker ending belongs to another.
Seo-yeon’s experience moves from one outcome to the next.
However, there is a crucial limitation.
The film never explicitly states that separate timelines coexist independently.
The branching-timeline model is an interpretation constructed to make sense of the ending.
It is not a confirmed explanation supplied by a character or an unambiguous rule demonstrated on screen.
11. A Step-by-Step Timeline Reconstruction
Here is the most coherent reconstruction under the branching-timeline interpretation.
| Stage | Event | Result |
|---|---|---|
| A | Seo-yeon and Young-sook connect across twenty years | Their histories become linked |
| B | Seo-yeon warns Young-sook about her adoptive mother | Young-sook survives and becomes a killer |
| C | Young-sook threatens Seo-yeon’s family and alters the past | A dangerous older Young-sook exists |
| D | Older Young-sook warns her younger self about Eun-ae and the officer | Young-sook gains information about the confrontation |
| E | Eun-ae pushes Young-sook over the railing | An apparent future without older Young-sook is shown |
| F | Young-sook’s survival changes the eventual outcome | Eun-ae disappears and Seo-yeon becomes a captive |
The table describes a proposed causal reconstruction, not six officially established parallel universes.
Its purpose is to clarify the competing changes.
The model works best if we allow the film to show a temporary future before the consequences of the warning fully overwrite it.
That is precisely where the interpretation becomes speculative.
The film does not explain why such a delay or transition would occur.
12. Could the Happy Ending Be a Temporary Timeline?
Yes, as a theory.
The cemetery reunion may represent a temporary reality produced by Eun-ae’s apparent victory.
In that reality, Young-sook’s future threat has disappeared.
Seo-yeon and her mother are reunited.
But the earlier warning from older Young-sook produces another outcome.
The younger Young-sook survives.
History changes again.
Eun-ae vanishes.
Seo-yeon becomes a prisoner.
This interpretation preserves the emotional significance of the cemetery scene.
Seo-yeon genuinely experiences reunion before it is taken away.
It also explains why the film shows her mother disappearing rather than simply cutting directly to a different ending.
The audience watches one reality being replaced by another.
But this model requires an assumption.
It assumes that changes to history can arrive in stages rather than producing a single immediately consistent present.
The film visually suggests that reality can be rewritten.
It does not fully explain the timing of those rewrites.
13. The Bootstrap Paradox: Who Warned the First Young-sook?
There is another difficulty.
Suppose older Young-sook knows she must warn her younger self because she has already experienced the consequences of the confrontation.
Where did that knowledge originate?
If she survives only because she receives the warning, the warning becomes part of the cause of her own existence.
This resembles a causal loop, often called a bootstrap paradox.
Information appears to circulate between past and future without a clearly identifiable original source.
The older Young-sook warns the younger Young-sook.
The younger Young-sook survives and becomes the older Young-sook.
That older Young-sook makes the warning call.
The loop sustains itself.
Some time-travel stories deliberately use this structure.
But The Call does not clearly establish that its universe permits self-consistent causal loops.
In fact, much of the film emphasizes changing outcomes rather than a fixed history that always contained the same events.
That makes the final loop especially difficult to interpret.
14. Why the Film’s Rules Are More Flexible Than They First Appear
Throughout The Call, changes to the past affect the present in dramatic, visually immediate ways.
But the film does not provide a complete theory of time.
It never explains why this particular telephone connects the two periods.
It does not establish whether other telephones could do the same.
It does not specify whether every alteration creates a new universe.
It does not fully explain what happens to memories when a timeline changes.
Nor does it define the exact speed at which a rewritten past affects the future.
These omissions matter.
Viewers may assume a precise set of rules because the film repeatedly demonstrates recognizable patterns.
But recognizable patterns are not the same as a complete system.
The final twist exploits the gap between what the audience has observed and what the film has actually established.
That can be seen as clever ambiguity.
It can also be seen as insufficient narrative explanation.
Both reactions are understandable.
15. Is the Ending a Plot Hole?
That depends on how strictly we interpret the film’s time-travel mechanism.
Under a single-timeline model with immediate, consistent changes, the ending is difficult to defend.
If older Young-sook is erased before she can make the necessary call, the call should be impossible.
If the call occurs earlier, its effects should already influence the future.
The temporary happy ending becomes difficult to explain.
Under a branching-timeline model, however, the contradiction can be reduced.
Different versions of history can produce different outcomes.
The warning call can originate from a version of the future in which older Young-sook still exists.
The final outcome can replace the cemetery reunion.
But the movie does not clearly establish this mechanism.
Our verdict is therefore more precise than simply calling the ending a plot hole.
The ending contains an unresolved causal ambiguity that can be repaired by a branching-timeline theory, but that theory requires assumptions the film does not explicitly confirm.
That is a fairer assessment than declaring the ending either perfectly logical or completely nonsensical.
16. Why Doesn’t Seo-yeon Remember Every Timeline?
Seo-yeon’s experience raises another question.
When the past changes, her surroundings and family circumstances transform.
Yet she retains enough awareness to recognize that something extraordinary has happened.
This makes her different from an ordinary person whose entire history has simply been rewritten.
She appears to maintain a continuity of consciousness across changing versions of reality.
One interpretation is that the telephone connection protects her awareness from being completely overwritten.
Another is that the film treats her as the audience’s point of reference, preserving her memory so the story remains understandable.
The movie does not confirm a scientific mechanism.
But the distinction is important.
If Seo-yeon can experience multiple versions of history while retaining awareness, the final cemetery scene may represent another transition in that experience.
She remembers her mother.
She sees her mother disappear.
Her reality changes around her.
The ending becomes not merely a change in external events, but a violation of Seo-yeon’s personal continuity.
17. Why Can Young-sook Exploit Time Better Than Seo-yeon?
Both women have access to the same extraordinary connection.
But they use it differently.
Seo-yeon initially wants to repair personal loss.
She hopes to save her father and protect the people she loves.
Young-sook increasingly wants control.
She uses threats, murder, and information to manipulate events.
The difference is not intelligence alone.
It is willingness to act without moral restraint.
Seo-yeon hesitates because she recognizes that changing the past can hurt people.
Young-sook becomes more dangerous as she discovers that other people’s lives can be treated as variables.
This creates a disturbing asymmetry.
The person with fewer moral limits can exploit the system more aggressively.
The telephone does not reward goodness.
It rewards whoever can use information and violence most effectively.
That is one reason the final twist feels so cruel.
Seo-yeon briefly escapes through her mother’s courage.
Young-sook responds by finding another way to manipulate the past.
18. TTK Original Analysis: The Real Horror Is Not Time Travel — It Is the Power to Rewrite Another Person’s Life
Most time-travel stories focus on the consequences of changing history.
The Call adds a darker question.
What happens when one person can rewrite another person’s life without consent?
Young-sook does not merely threaten Seo-yeon’s future.
She can change the circumstances of Seo-yeon’s childhood.
She can kill family members before Seo-yeon has grown old enough to defend them.
She can transform the house where Seo-yeon lives.
She can erase relationships.
She can make memories incompatible with the world around her.
This is an extreme form of power.
It removes the victim’s ability to participate in decisions that determine their own existence.
Seo-yeon cannot negotiate with history on equal terms.
She must negotiate with someone who can alter history.
The film’s supernatural premise therefore creates a recognizable political and social question.
What happens when the people who control the past also control which version of reality everyone else must live in?
Young-sook’s violence is frightening because it reaches beyond the body.
She can attack the conditions that make a person’s identity possible.
19. Young-sook Does Not Simply Kill People — She Controls the Evidence That They Existed
When history changes, the present changes with it.
Objects, documents, and living circumstances are rewritten.
This gives Young-sook a power that an ordinary murderer does not possess.
A conventional criminal may try to destroy evidence after committing a crime.
Young-sook can alter the historical events that created the evidence in the first place.
That difference is profound.
Seo-yeon cannot simply gather reliable information and expect it to remain stable.
The evidence may change while she is investigating it.
A record that once revealed Young-sook’s future can become obsolete.
A familiar home can transform into a different environment.
The ordinary foundations of truth become unstable.
The movie turns time travel into a struggle over reality itself.
The person who changes the past can change what the present is able to prove.
This is why the telephone is more frightening than a conventional weapon.
It threatens not only life, but the possibility of establishing what happened.
20. The Mid-Credits Scene Reverses the Meaning of the Entire Story
At first, Seo-yeon believes the past can be repaired.
She learns that changing history can also unleash disaster.
By the climax, she appears to discover a way to defeat Young-sook.
Her mother acts courageously.
The older killer disappears.
Seo-yeon is reunited with the person she thought she had lost.
That apparent ending suggests that love and sacrifice can overcome the damage caused by manipulating time.
Then Young-sook calls herself.
The new ending destroys that reassurance.
The past remains vulnerable to further intervention.
Victory is not permanent.
Even after Seo-yeon appears to have escaped, another decision made in an earlier period can erase the outcome.
The final twist therefore changes the film’s moral atmosphere.
The story is no longer about whether Seo-yeon can correct one terrible mistake.
It becomes a story about whether anyone can ever be safe when history itself remains open to attack.
21. Why the Final Call Is More Terrifying Than Young-sook’s Murders
Young-sook’s murders are brutal.
But the final call demonstrates something even more disturbing.
She can use knowledge of her own defeat to prevent it.
An ordinary villain who loses a final confrontation cannot simply warn an earlier version of themselves.
Young-sook can.
At least, that is what the film’s ending invites us to believe.
Her defeat becomes information.
Information becomes preparation.
Preparation becomes survival.
The hero’s victory becomes the villain’s advantage.
This is a reversal of the usual thriller structure.
Normally, the protagonist learns from failure and becomes stronger.
Here, the antagonist appears to learn from a future defeat and use that knowledge to eliminate the possibility of defeat.
The final telephone call turns experience itself into a weapon.
It suggests that Young-sook can make the future serve her interests before anyone else has the opportunity to resist.
22. Does the Ending Mean Young-sook Can Never Be Defeated?
Not necessarily.
The film shows one successful intervention by Young-sook.
It does not establish that she can survive every possible threat.
Her ability depends on access to the telephone, information about future events, and an opportunity to act in the past.
Those conditions may not always exist.
The ending also does not prove that every version of Young-sook can communicate freely with every other version.
It demonstrates a specific warning call.
The broader mechanics remain unexplained.
Therefore, the conclusion that Young-sook has become permanently invincible goes beyond what the movie confirms.
What the ending does establish is narrower and more disturbing.
She has found a way to reverse an apparent defeat.
And Seo-yeon is left without an obvious means of escaping the new reality.
23. What Does the Final Image of Seo-yeon Mean?
The film ends with Seo-yeon restrained and terrified.
The implication is that Young-sook has preserved a version of history in which she retains control over Seo-yeon.
The exact sequence of events that leads to this captivity is not fully shown.
That omission is deliberate.
The audience sees the outcome without receiving every intervening step.
The final image is therefore less about explaining logistics than about confirming a reversal of power.
Seo-yeon began the story as someone who could use knowledge of the future to help another person.
She ends as someone whose future has been taken away.
Young-sook began as someone who appeared to be trapped by a terrifying destiny.
She ends as someone who has learned to weaponize destiny against others.
The two characters exchange positions.
The apparent victim becomes the controller.
The person who offered help becomes the captive.
That reversal gives the ending its emotional force.
24. Final Verdict: The Call Explains Who Made the Call, but Not Fully How the Timeline Allows It
So how did Young-sook call herself?
The most straightforward answer is that the older Young-sook placed the warning call before the confrontation that appeared to erase her.
The mid-credits sequence reveals the call later, but that does not mean it occurred later.
This resolves the immediate question of how an erased person could physically make a telephone call.
However, the film still leaves a larger problem.
Why does the audience see a future in which Young-sook disappears and Seo-yeon’s mother survives, only for that future to be overwritten?
A branching-timeline interpretation offers one solution.
The warning creates or reveals a different version of history.
The happy ending is temporarily experienced before the darker outcome replaces it.
But the film does not explicitly establish the mechanics of parallel timelines or delayed changes.
That means the ending is not completely explained by the evidence on screen.
The phone call is narratively understandable. Its exact temporal mechanics remain unresolved.
And perhaps that is why viewers continue debating the ending.
The movie gives us enough information to construct an explanation, but not enough to prove that our explanation is correct.
The unresolved paradox also reinforces the film’s deepest fear.
Seo-yeon is fighting an enemy who can reach into the past and change the world before she has any chance to defend herself.
Young-sook does not simply want to survive.
She wants to control which version of history survives.
And in the film’s final moments, she succeeds.
The true horror of The Call is not that the past can change the future. It is that someone else can change your past—and leave you trapped in a future you never chose.
Frequently Asked Questions
How did Young-sook call herself in The Call?
The mid-credits scene reveals that an older Young-sook calls her younger self to warn her about Eun-ae and a police officer. The most straightforward interpretation is that the call was made before the confrontation shown earlier, even though the audience learns about it afterward.
How could Young-sook call herself if she disappeared?
This is the ending’s central paradox. The call can be understood as an earlier event revealed later, but the movie does not fully explain why the apparent happy ending is subsequently overwritten.
Does The Call have multiple timelines?
Multiple timelines are a plausible interpretation, but the film never explicitly confirms a branching-universe system. It shows the present being rewritten when the past changes.
Is The Call’s ending a plot hole?
It contains an unresolved causal ambiguity. A branching-timeline or staged-rewrite theory can explain the twist, but both require assumptions that the film does not clearly establish.
Did Young-sook survive the fall?
The mid-credits sequence shows the younger Young-sook opening her eyes after the fall, indicating that she survived the apparent fatal confrontation.
Why did Seo-yeon’s mother disappear?
Young-sook’s survival changes the past again. The resulting history removes Eun-ae from Seo-yeon’s present. The exact details of what happens to Eun-ae afterward are not fully shown.
What happens to Seo-yeon at the end?
The final scene shows adult Seo-yeon restrained in Young-sook’s captivity, implying that the revised history leaves her under the killer’s control.
Does Young-sook become immortal?
No. The film does not establish immortality. It shows that Young-sook can use information from the future to prevent at least one apparent defeat.
Who directed The Call?
The Call was directed by Lee Chung-hyeon and stars Park Shin-hye and Jeon Jong-seo.
Is The Call based on another movie?
Yes. The Korean film is based on the premise of the 2011 British-Puerto Rican thriller The Caller, though the Korean adaptation develops its own characters and ending.
Sources and Further Reading
Apple TV — The Call (2020)
Film synopsis, cast, and director information.
https://tv.apple.com/us/movie/the-call/umc.cmc.188ld9fn39n0nmz1yuw52ekrs
IMDb — The Call (2020), Plot Summary
Detailed narrative chronology, including the final confrontation and the mid-credits warning call.
High On Films — The Call Ending Explained and Themes Analysed
Analysis of Young-sook’s warning call, her survival, and Seo-yeon’s captivity.
This Is Barry — The Call Ending Explained
An independent multi-timeline reconstruction. Its branching-timeline model is an interpretation, not a confirmed rule established by the film.
Distractify — The Call’s Shocking Final Scenes
Summary of the mid-credits reversal and its implications for Seo-yeon.
Continue Reading — The Call Ending Analysis
Part 1 — The Impossible Phone Call
The Call Ending Explained: How Did Young-sook Call Herself?
Part 2 — Coming Next
The Call: Why Did Seo-yeon’s Mother Disappear at the End?
TTK Original — Beyond the Headlines
True Taste Korea | October 23, 2026
This article distinguishes events shown in the film from proposed interpretations of its time-travel mechanics. The branching-timeline explanation is a theory, not a confirmed statement by the filmmakers.