Two separate murder plots. One dead professor. A desperate taxi driver blamed for a killing he never completed. The real mystery of Na Hong-jin’s The Yellow Sea is not who pulled the trigger — but why so many people wanted the same man dead.
Warning: Major spoilers for The Yellow Sea (2010).
Gu-nam traveled from China to South Korea to kill one man.
He was promised enough money to escape his gambling debts and perhaps rebuild his shattered life.
The assignment appeared straightforward: find Professor Kim Seung-hyun, murder him, collect the evidence, and return home.
But when Gu-nam finally reached his target, something extraordinary happened.
Someone else was already killing the professor.
Gu-nam had not been told about the other assassins.
He did not know that a wealthy businessman had his own reasons for wanting the professor dead.
He did not know that the professor’s marriage concealed another conspiracy.
And he certainly did not know that the people who hired him would eventually become some of the people hunting him.
What looks like a chaotic collection of gangsters, betrayals, and seemingly unrelated killings is actually built around a disturbing idea.
Two separate groups ordered the murder of the same man — and neither understood the full consequences of the other group’s actions.
To understand The Yellow Sea, we must untangle those two plots.
1. Who Was Professor Kim Seung-hyun?
Professor Kim Seung-hyun is the target of the assassination assignment that brings Gu-nam to South Korea.
But he is not simply an innocent academic caught in an inexplicable conspiracy.
Behind his respectable public identity lies a world of money, extramarital relationships, and questionable business connections.
His personal relationships create enemies in more than one direction.
One powerful businessman wants revenge over an affair.
Meanwhile, people within the professor’s own domestic circle have a separate reason to want him eliminated.
This is the foundation of the film’s central mystery.
The professor is not being pursued by one criminal organization operating through several intermediaries.
He has become the target of two different murder arrangements.
Understanding that distinction is essential.
Otherwise, the later confrontations between Myun-ga, Kim Tae-won, and Gu-nam can seem almost impossible to follow.
2. The First Murder Plot: Kim Tae-won’s Revenge
Kim Tae-won is a wealthy businessman with criminal connections.
He discovers that Professor Kim has been involved with a woman close to him — commonly identified in plot accounts as Tae-won’s wife or romantic partner.
The affair is a profound humiliation for Tae-won.
Rather than confront the situation through any legitimate means, he chooses violence.
He arranges for the professor to be murdered.
The plan involves the professor’s own driver and additional attackers.
This is an important detail.
The danger does not come only from strangers approaching the professor from outside.
It comes from someone who already has access to his movements and daily routines.
The driver is supposed to be a trusted figure.
Instead, he becomes part of the assassination.
The betrayal is intimate before it becomes violent.
When the attack begins, the professor fights back against the men sent to kill him.
But the driver ultimately delivers the fatal attack.
Professor Kim is killed by men connected to Tae-won’s revenge plot — not by Gu-nam completing his original assignment.
That fact changes the meaning of everything that follows.
3. The Second Murder Plot: The Professor’s Wife and the Banker
The second conspiracy begins elsewhere.
Professor Kim’s wife has her own grievance against her husband.
She is connected to a banker, Kim Jeong-hwan, with whom she is involved romantically.
Together, their interests lead toward the professor’s removal.
The banker becomes a crucial intermediary in a separate murder-for-hire arrangement.
Through additional contacts, the assignment reaches Myun-ga in Yanji, China.
Myun-ga then recruits Gu-nam.
The chain can be understood as follows:
Professor Kim’s wife and Kim Jeong-hwan → intermediaries → Myun-ga → Gu-nam.
This is the arrangement that brings Gu-nam across the Yellow Sea.
The important point is that the professor’s wife and the banker are not simply employees carrying out Kim Tae-won’s orders.
Their plot is separate.
They want the same man dead, but their interests and relationships are different.
The film’s confusion comes partly from the fact that these two murder operations converge without the participants fully understanding one another.
4. The Two Assassination Plots — Side by Side
| Question | Tae-won’s plot | Wife and banker’s plot |
|---|---|---|
| Who wants Professor Kim dead? | Kim Tae-won | Professor Kim’s wife and Kim Jeong-hwan |
| Principal motive | Revenge over an affair | Personal and romantic interests connected to the marriage |
| How is the killing arranged? | Through the professor’s driver and other attackers | Through intermediaries, Myun-ga, and Gu-nam |
| Who reaches the victim first? | Tae-won’s men | Gu-nam arrives during the attack |
| Who actually kills the professor? | The driver involved in Tae-won’s operation | Gu-nam does not complete the killing |
This comparison explains the central irony.
Gu-nam is hired to murder someone who is already being targeted by another group.
He enters the scene at precisely the wrong moment.
The coincidence destroys his chance of completing the job as planned.
But it also exposes him to a criminal conflict far larger than anything he agreed to participate in.
5. Why Does Gu-nam Cut Off the Professor’s Thumb?
One of the most memorable details in The Yellow Sea is Gu-nam’s attempt to obtain the professor’s thumb.
It can appear grotesque or irrational when viewed outside the contract’s context.
But Gu-nam has been instructed to bring back physical evidence that the target is dead.
When he discovers that the professor has already been attacked, he still needs proof to satisfy the people who hired him.
The thumb becomes that proof.
This is a horrifying illustration of Gu-nam’s position.
He is no longer acting according to a coherent plan.
He is trying to salvage an assignment that has collapsed.
He believes that obtaining the required evidence may allow him to receive payment and escape.
Instead, his presence at the murder scene makes him appear responsible for a killing committed through another conspiracy.
The evidence he collects does not protect him.
It helps trap him in the aftermath.
6. Why Is Gu-nam Blamed for a Murder He Did Not Commit?
Gu-nam is present at the crime scene.
He fights with one of the attackers.
He takes part in the violence surrounding the professor’s death.
He is discovered in circumstances that make him look like an obvious suspect.
From the perspective of investigators who do not know about the two separate murder contracts, the situation appears much simpler than it really is.
A man has been killed.
A suspicious stranger is fleeing.
That stranger has no legitimate explanation for being there.
But the audience knows something the authorities do not.
Gu-nam was indeed planning to kill the professor.
He simply did not carry out the murder for which he is blamed.
This moral contradiction is central to the film.
Gu-nam is not innocent in the ordinary sense.
He accepted money to commit murder.
Yet he is also being pursued for the actions of people whose plans he never knew existed.
The film refuses to divide its characters neatly into innocent victims and guilty criminals.
Instead, it asks what happens when a morally compromised person becomes the victim of an even larger system of betrayal.
7. Why Does Kim Tae-won Want Gu-nam Dead?
Once the professor is murdered, Kim Tae-won discovers that another suspicious man was involved at the scene.
From Tae-won’s perspective, Gu-nam represents an unpredictable threat.
Who is he?
Who sent him?
What does he know?
Could his presence expose Tae-won’s involvement in the assassination?
Tae-won has no reason to assume that Gu-nam was simply another hired killer whose contract happened to overlap with his own.
He responds by trying to eliminate the threat.
His men investigate Gu-nam’s connections and eventually trace the trail back toward Myun-ga.
This creates another destructive misunderstanding.
Tae-won believes he is protecting himself from exposure.
Myun-ga sees Tae-won’s intervention as a threat to his own survival and interests.
And Gu-nam is caught between them.
The original murder is over, but the effort to conceal it creates a second wave of violence.
The men who arranged the assassination begin killing or pursuing people who might reveal how it happened.
8. Why Does Myun-ga Turn Against Gu-nam?
Myun-ga originally recruits Gu-nam because the desperate taxi driver is useful.
Gu-nam needs money.
He has few options.
He can be sent across the border to carry out a dangerous assignment.
But Myun-ga’s loyalty is not personal.
It is transactional.
Once the assignment collapses and powerful criminals begin tracing the operation, Gu-nam becomes a liability.
Keeping him alive may threaten the people behind the contract.
At the same time, Myun-ga is forced to confront the consequences of a murder operation that he did not fully control.
He survives an attempt on his own life and travels to South Korea.
There, he becomes entangled with Tae-won’s organization.
The relationship between the two men is not built on trust.
It is a temporary arrangement between violent men who each believe they can use the other.
Myun-ga wants money, leverage, and survival.
Tae-won wants to eliminate threats and protect himself.
Neither man’s interests align with Gu-nam’s.
The taxi driver who was originally supposed to be a disposable instrument has become a problem that both sides want to resolve.
9. Why Does Myun-ga Become So Dangerous?
Myun-ga’s transformation is one of the film’s most striking developments.
At first, he appears to be a powerful criminal operating in Yanji.
He controls gambling-related networks and has the authority to recruit desperate men.
But when Tae-won’s organization tries to eliminate him, the film reveals just how formidable he is.
Myun-ga is not simply a middleman who passes assignments to others.
He is capable of extraordinary violence himself.
His brutal confrontations with Tae-won’s men shift the balance of power.
What begins as an effort to silence a criminal contractor becomes a deadly struggle between organizations.
This is another example of the film’s central pattern.
Every attempt to eliminate uncertainty produces more uncertainty.
Every attempt to control violence creates more violence.
And every criminal believes he can survive by becoming more ruthless than his opponents.
Eventually, that logic destroys nearly everyone involved.
10. What Happens Between Myun-ga and Tae-won?
The conflict reaches its climax when Myun-ga confronts Tae-won and his men.
By this stage, the original assassination has become almost secondary.
The people responsible for arranging and concealing the killing are now fighting for their own survival.
Myun-ga unleashes devastating violence against Tae-won’s organization.
Tae-won is fatally wounded.
Myun-ga also suffers injuries that ultimately lead to his death.
Neither emerges as the victorious mastermind.
Their confrontation exposes the absurdity of the power they believed they possessed.
Both men controlled other people’s lives.
Both used violence to pursue their interests.
Both assumed they could manipulate the people beneath them.
Yet their efforts to maintain control eventually bring about their own destruction.
The original victim, Professor Kim, is already dead.
Now the men responsible for the competing murder operations are dying as well.
But the story is not finished.
Gu-nam still needs to discover who set everything in motion.
11. Why Does Gu-nam Go to the Bank?
One of the film’s most important late revelations involves the banker, Kim Jeong-hwan.
As Gu-nam follows the evidence left by the assassins and their intermediaries, he obtains information pointing toward the banker’s involvement.
This leads him to the bank.
There, he sees the banker connected to Professor Kim’s widow.
The encounter allows him to understand the hidden relationship behind the contract that reached Myun-ga.
This is the missing link.
Until this point, Gu-nam has encountered a bewildering succession of people who seem to want him dead.
He has pursued Myun-ga.
He has discovered Tae-won’s involvement.
He has witnessed the destruction of criminal networks.
But the bank scene reveals that the original assignment was tied to the professor’s own marriage.
The man who sent Gu-nam into danger was not acting on behalf of the same conspiracy that actually killed the professor.
The two plots were independent.
Gu-nam has finally reached the origin of the arrangement that brought him to South Korea.
Yet his response is unexpected.
12. Why Doesn’t Gu-nam Kill the Banker?
By the time Gu-nam reaches the bank, he has endured extraordinary suffering.
He has been deceived, hunted, injured, and deprived of almost every possibility of escape.
The banker is connected to the arrangement that started the disaster.
Gu-nam could seek revenge.
But he leaves without killing him.
Why?
One interpretation is that Gu-nam finally understands the personal motive behind the assassination.
He sees that the banker and the professor’s wife were involved in a relationship that led to the murder plot.
Their motive is ugly, but it is no longer incomprehensible.
Another interpretation is that Gu-nam has reached the limits of revenge.
He has already seen what happens when every betrayal produces another killing.
Murdering the banker would not restore his life.
It would not bring back the people who died.
It would not erase his debts.
And it would not answer the question that originally mattered most to him: what happened to his wife?
The film does not give Gu-nam a long speech explaining his decision.
But the scene allows a powerful reading.
After spending the film trying to survive other people’s violence, Gu-nam finally encounters a moment when he does not have to continue it.
His decision does not make him innocent.
It suggests that he has recognized the futility of another act of revenge.
13. The Most Important Detail: Everyone Thinks They Know the Whole Story
The assassination conspiracy is complicated because each participant understands only part of it.
Gu-nam knows he has been hired to kill the professor.
He does not know another team has been sent.
Tae-won knows he has ordered the professor’s murder.
He does not initially understand why Gu-nam appears at the scene.
Myun-ga knows the contract he has passed to Gu-nam.
He does not control the rival operation.
The professor’s wife and the banker understand their own arrangement.
They cannot control the consequences once the competing assassins converge.
Each participant acts according to incomplete information.
This produces the film’s chain of disastrous decisions.
Tae-won tries to eliminate Gu-nam.
Myun-ga responds to threats against himself.
Gu-nam pursues the people who betrayed him.
Their actions collide because none possesses a complete understanding of the situation.
The Yellow Sea is not simply a story about betrayal. It is a story about people making deadly decisions while misunderstanding the world around them.
14. What Reddit Viewers Find So Confusing
International audiences have repeatedly asked for explanations of the film’s murder conspiracy.
In a discussion on r/movies titled Can anyone explain the ending of The Yellow Sea?, one viewer explained that the overlapping plots and subtitles made the ending difficult to follow.
A detailed reply reconstructed the characters and the two murder arrangements.
That response identified the essential distinction: Tae-won and the professor’s wife separately arranged for the professor to be killed.
The discussion also illustrates why the film can remain confusing even after a first viewing.
Viewers must follow multiple relationships, intermediaries, and motives while the film moves rapidly through violent confrontations.
Some of the most important information emerges late.
By the time the banker and the professor’s wife become central to the explanation, several other characters have already died.
The result is a thriller that almost demands reconstruction.
But the complexity is not merely a puzzle for viewers to solve.
It serves the film’s larger themes.
The audience experiences some of the same uncertainty that overwhelms Gu-nam.
We are forced to assemble the truth from fragments.
15. TTK Original Analysis: The People Who Order Violence Rarely Pay Its Full Price
There is a striking difference between the people who order the murders and the people who carry them out.
The professor’s wife and the banker can arrange a killing through intermediaries.
Tae-won can rely on employees and hired attackers.
Myun-ga can recruit a desperate man from Yanji.
But Gu-nam must physically cross the sea.
He must enter the building.
He must risk arrest.
He must fight for survival.
And he must suffer the consequences when the plans collapse.
This reveals a hierarchy of risk.
Those with money can purchase violence. Those without money are forced to perform it.
The people at the top of the chain attempt to distance themselves from the physical consequences of their decisions.
Each intermediary creates another layer between the person ordering the crime and the person carrying it out.
That distance is useful.
It makes responsibility harder to trace.
It allows the people giving orders to treat murder as a transaction.
And it makes the people performing the dangerous work easier to replace.
Gu-nam’s poverty is therefore not merely background information.
It is what makes him available to the system.
His gambling debts give Myun-ga leverage.
His desire to find his wife gives him another reason to accept the journey.
His precarious status in South Korea leaves him with few protections when the assignment goes wrong.
He is the ideal disposable worker in a criminal economy.
He is desperate enough to accept the job and vulnerable enough to be abandoned afterward.
16. The Film’s Darkest Irony: The Murder Was Already Done
Consider the cruel absurdity of Gu-nam’s position.
He accepts a contract to murder Professor Kim.
He crosses an international border.
He risks everything.
Then, before he can complete the assignment, someone else kills the target.
In theory, Gu-nam should no longer be necessary.
But his presence at the scene makes him dangerous to the people behind both operations.
Instead of escaping responsibility for murder, he becomes trapped by a murder he did not complete.
His failure to carry out the contract does not save him.
It destroys him.
This is what makes The Yellow Sea different from a conventional story about a hired killer.
The protagonist is not a brilliant assassin navigating a world of professional criminals.
He is a desperate man who enters a criminal system without understanding its rules.
He does not control the assignment.
He does not control the information.
He does not control his escape route.
He does not even control whether the person he has been hired to kill remains alive long enough for him to act.
His supposed opportunity to change his life is an illusion from the beginning.
17. Was There One True Mastermind?
If we define the mastermind as the person who ultimately caused Professor Kim’s death, the answer is complicated.
Tae-won’s operation directly results in the killing.
But the professor’s wife and the banker independently commission another murder attempt.
Both sides bear responsibility for plotting the death of the same man.
The professor’s driver carries out the fatal act.
Myun-ga organizes the separate contract that brings Gu-nam into the situation.
And Gu-nam accepts that contract even though he does not complete the murder.
Responsibility therefore exists at several levels.
There are people who desire the murder.
People who finance or arrange it.
People who recruit the killers.
People who physically attack the victim.
And people who try to conceal the crime afterward.
No single explanation captures every layer.
This is why the question Who ordered the murder? has a surprising answer.
More than one person did.
And the collision between those orders is what turns the assassination into a catastrophe.
18. Final Thoughts: Gu-nam Was Never Supposed to Understand
The final revelation at the bank completes the film’s criminal puzzle.
Gu-nam discovers the relationship connecting the professor’s wife, the banker, and the contract that reached him through Myun-ga.
He can finally see how the separate plots intersected.
But the knowledge arrives too late.
The people who manipulated him have already set in motion a chain of violence that cannot be reversed.
His body is failing.
His chance of returning home is disappearing.
And the mystery of his own wife remains unresolved.
That contrast is essential.
Gu-nam eventually learns why Professor Kim was targeted.
But he never learns with certainty what happened to the woman he crossed the sea hoping to find.
He solves the mystery that belonged to other people.
He dies without solving the mystery that belonged to him.
In the end, The Yellow Sea is not merely about two competing murder plots.
It is about the terrible cost of becoming trapped inside other people’s desires.
The rich and powerful make decisions.
Intermediaries carry out instructions.
Desperate people accept risks.
And when everything collapses, the people with the least power often pay the highest price.
Gu-nam was hired to kill a stranger.
But the real victim of the conspiracy was also the man who never understood why his life had been destroyed.
Frequently Asked Questions
Who ordered Professor Kim’s murder in The Yellow Sea?
Two separate parties arranged for Professor Kim Seung-hyun to be killed. Kim Tae-won organized one attack, while the professor’s wife and banker Kim Jeong-hwan were behind the separate contract passed through Myun-ga to Gu-nam.
Did Gu-nam kill Professor Kim?
No. The professor is killed during the attack organized by Kim Tae-won. Gu-nam becomes involved at the scene and takes the professor’s thumb as evidence for his own contract.
Why did Kim Tae-won want the professor dead?
Tae-won wanted revenge after discovering the professor’s affair with a woman close to him.
Why did the professor’s wife want him killed?
Her involvement is connected to the professor’s infidelity and her own relationship with banker Kim Jeong-hwan.
Who hired Myun-ga?
The assassination contract reached Myun-ga through intermediaries connected to Kim Jeong-hwan and the professor’s wife.
Why did Myun-ga pursue Gu-nam?
Gu-nam became a liability after the murder operation collapsed. Myun-ga’s involvement with Tae-won and the effort to eliminate Gu-nam were driven by criminal self-interest and survival.
Why didn’t Gu-nam kill the banker?
The film leaves his exact reasoning open to interpretation. One plausible reading is that he finally understood the conspiracy and recognized that another killing would not restore what he had lost.
Was Kim Tae-won the only mastermind?
No. Tae-won organized the attack that actually killed the professor, but a separate murder contract had also been arranged through the professor’s wife and the banker.
Sources and Further Reading
Korean Film Council (KOFIC) — Official synopsis and production information for The Yellow Sea.
Yonhap News Agency — The Yellow Sea chases after betrayals in the mean streets of Seoul (December 20, 2010).
The Journal of Asian Studies — Uncanny Hybridity and Nostalgia Politics in The Yellow Sea. Academic discussion of the film’s social hierarchy, betrayals, and intersecting assassination plots.
Reddit r/movies — Can anyone explain the ending of The Yellow Sea? Detailed viewer discussion of the two murder conspiracies and their intermediaries.
Continue Reading — The Yellow Sea Trilogy
Part 1 — The Ending Mystery
The Yellow Sea Ending Explained: Was Gu-nam’s Wife Really Alive?
Part 2 — The Murder Conspiracy
Who Really Ordered the Murder in The Yellow Sea? Every Betrayal Explained
Part 3 — Coming Next
The Yellow Sea: Was Gu-nam Destroyed by His Wife, His Choices, or the System?
TTK Original — Beyond the Headlines
True Taste Korea | October 23, 2026
This analysis distinguishes the film’s events from interpretations of character motives and themes. The movie’s competing assassination plots are reconstructed from the narrative and supporting film scholarship.