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Plot Summary

The Tooth and the Nail (2017) Plot Summary Explained

Release, runtime and language
2017 · 109 mins · Korean
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Directed by
Kim Hwi, Jung Sik
Starring
Oh Kwang-rok, Kim Joo-hyuk, Moon Sung-keun, Kim Tae-woo, Park Ji-a, Park Sung-woong

A magician named Seok-jin working at a club encounters a captivating woman, Ha-yeon, who becomes his assistant and fiancée. However, their lives are thrown into turmoil when Ha-yeon is found dead. Seok-jin is compelled to investigate the circumstances surrounding her death, uncovering unsettling truths and grappling with the lingering evidence of a missing corpse.

On this page (6)
  1. 1 Where to watch
  2. 2 What happens: full plot
  3. 3 Plot questions answered
  4. 4 Movie threads
  5. 5 Movies like The Tooth and the Nail
  6. 6 Every angle
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Full plot summary · contains spoilers

What Happens in The Tooth and the Nail: Full Plot Summary

The whole story of The Tooth and the Nail (2017) explained, from the opening scene to the final frame: every key event, every twist and what it all adds up to. Read it as a quick recap before the sequel, to check a scene you missed, or to finally understand what really happened.

In late 1940s Seoul, a chilling murder within a cold stone mansion sets off a chain of revelations that stitch together love, betrayal, and a buried wartime past. A nationally renowned circus magician, Lee Seok-jin, meets Ha-yeon Im Hwa-young and what begins as a tender romance soon deepens into marriage, with Ha-yeon carrying their unborn child. As they settle into a shared life of performances and secrets, a copper plate used to manufacture counterfeit banknotes surfaces, linking Ha-yeon to a shadowy period when a man named Shigeru Okamoto approached her uncle to forge money. The police circle tightens, Ha-yeon hides the plate, and Seok-jin’s instinct to protect her grows desperate when he learns Okamoto is still dangerous. When Ha-yeon is abruptly pushed to her death on a street, Seok-jin’s grief hardens into a consuming resolve to avenge what was lost, including the life of their child, and he drifts away from the magic that once defined him.

Grief gives way to a calculated pursuit of vengeance. A chance encounter with a counterfeit-note trail leads Seok-jin down a dangerous path toward the man he believes to be at the heart of Ha-yeon’s fate. To reach Okamoto without drawing suspicion, he changes his name, adopts the alias Choi Seung-man Go Soo, and becomes a penniless taxi driver who tests every note he receives by burning it—a test that slowly reveals a broader network. While working the streets, he discovers that the mastermind behind the forged notes is Nam Do-jin Kim Joo-hyuk, a multilingual Korean who lives a life of quiet power in a stone mansion. Seok-jin embeds himself in Do-jin’s world, watching every movement as he quietly crafts a plan to bring down his former enemy and clear Ha-yeon’s memory. The path to revenge travels through deception, danger, and a broker’s game of cat and mouse.

The web tightens as Do-jin’s shadowy operations touch the lives of others close to Seok-jin. A calculating brothel owner, Ms. Sung, becomes a focal point in the peril surrounding Ha-yeon’s memory. When Do-jin confronts a printer who can expose the counterfeit scheme, he silences him violently, and Ms. Sung becomes an unwitting witness in the escalating danger. Seok-jin, now deeply embedded as the driver in Do-jin’s household, obtains Sung’s own chilling letter and a severed head that Do-jin has already disposed of, a grisly clue that underscores the dark costs of the pursuit. The emotional stakes rise as Seok-jin contends with the weight of his choices, slowly choosing not to read the letter and instead treasuring the memory of Ha-yeon, a memory he keeps close alongside her ring.

In the courtroom, truth and inference clash as Do-jin faces murder charges tied to the disappearance of Seung-man and the broader counterfeit operation. The prosecution builds its case around circumstantial proof, including the severed finger and the blood evidence tied to Sung’s head, while Do-jin insists on his innocence and questions whether there is direct evidence that ties him to Seung-man’s death. A turning point arrives when Seok-jin himself takes the stand as an anonymous tipster who eventually reveals his true identity as Choi Seung-man, confronting Do-jin with the realization that he has nothing to fear from a distant accuser—yet the court’s questions about identity, motive, and connection intensify. The confrontation exposes the fragility of certainty, and with no small measure of drama, Do-jin’s fate is sealed.

Ultimately, Nam Do-jin is convicted of murder and sentenced to life in prison, with additional charges to be addressed in a future proceeding. Seok-jin, having achieved his long-sought revenge and justice for Ha-yeon and their unborn child, returns to the circus to resume his career, carrying a quiet, steadfast memory of his lost love. In the end, the magician keeps a small keepsake—a photo of Ha-yeon and her ring—by his side, a constant reminder of what he sacrificed and what he finally avenged.

Last updated: October 01, 2025 at 13:06

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Plot questions answered

The Tooth and the Nail Plot Explained: Your Questions Answered

The questions people ask most about The Tooth and the Nail (2017): what happens in the confusing scenes, why the characters do what they do, the twists, hidden details and what the ending means. Each answer contains spoilers.

Q1

Why was Ha-yeon killed and what was her connection to the copper plate?

Ha-yeon was killed because she possessed a copper plate used to manufacture counterfeit banknotes from the Japanese occupation era. Her uncle had helped forge money for a man named Shigeru Okamoto during the war, and when Okamoto later returned to retrieve the plate, Ha-yeon refused to hand it over. This made her a threat to the counterfeit operation, leading to her murder. The copper plate represented evidence of the illegal activity and was valuable to the criminal network.

Foreshadowing: Earlier on a bus, Ha-yeon is seen passing a letter to a woman, hinting at her involvement with dangerous figures from her past.

  • ha-yeon
  • copper plate
  • counterfeit
  • okamoto
  • murder原因
Q2

Who actually killed Ha-yeon and why?

Nam Do-jin killed Ha-yeon. While Seok-jin initially believed Shigeru Okamoto was responsible, it was actually Do-jin who pushed Ha-yeon to her death on the street. Do-jin admits to killing her to silence her, explaining that she knew too much about the counterfeit operation. Do-jin was the mastermind behind the forged notes, not merely an associate of Okamoto as initially believed.

Foreshadowing: The summary mentions Okamoto is dangerous, but later reveals point to Do-jin as the true threat hiding in plain sight.

  • nam do-jin
  • killer
  • ha-yeon death
  • murder confession
Q3

Why does Seok-jin become Nam Do-jin's driver under an alias?

After Ha-yeon's death, Seok-jin abandons his circus career and becomes consumed with revenge. He changes his name to Choi Seung-man and poses as a poor taxi driver to get close to Nam Do-jin, whom he suspects is behind Ha-yeon's murder and the counterfeit operation. By becoming Do-jin's personal driver, Seok-jin gains access to his home and daily movements, allowing him to gather evidence while planning his revenge.

Foreshadowing: A chance encounter with a counterfeit note two years after Ha-yeon's death rekindles his drive for vengeance.

  • alias
  • driver
  • revenge plan
  • infiltration
  • choi seung-man
Q4

What is the copper plate and why does it matter in the story?

The copper plate is a printing plate used to manufacture counterfeit banknotes during the Japanese occupation. Ha-yeon's uncle helped create it for Shigeru Okamoto, and after her uncle was killed, Ha-yeon kept the plate to protect herself and her family. The plate becomes the centralMacGuffin that connects Ha-yeon's past to the criminal underworld, ultimately leading to her death when she refuses to surrender it to the conspiracy.

Foreshadowing: The bus-side revelation shows Ha-yeon passing a letter, hinting at her secretive dealings.

  • copper plate
  • counterfeit money
  • forgery
  • japanese occupation
Q5

Why does Nam Do-jin kill the printer and Ms. Sung?

Do-jin kills the printer because the man knows about the copper plate and could expose the entire counterfeit operation when questioned by authorities. He murders Ms. Sung because she witnessed his crime and confronts him about his involvement with Ha-yeon. Do-jin kills to silence anyone who threatens to reveal his criminal network, demonstrating his ruthless nature and the lengths he'll go to protect his operation.

Foreshadowing: The 10 PM phone call engineered by Do-jin sets up the printer's death.

  • murder
  • printer
  • ms sung
  • cover-up
  • counterfeit network
Q6

What is the connection between Shigeru Okamoto and Nam Do-jin?

Shigeru Okamoto was the Japanese-era contact who originally approached Ha-yeon's uncle to forge the copper plate. While Seok-jin initially hunts Okamoto as the primary villain, he discovers that Nam Do-jin is actually the mastermind behind the current counterfeit operation. Do-jin is a multilingual Korean who runs the criminal network from his stone mansion, and it appears he may have ties to or replaced Okamoto in the illegal enterprise.

Foreshadowing: Seok-jin's multilingual clues hint at Okamoto's true identity and connections.

  • okamoto
  • nam do-jin
  • connection
  • counterfeit
  • mastermind
Q7

How does Seok-jin's courtroom testimony help convict Do-jin?

Seok-jin testifies as an anonymous tipster who had been reporting evidence against Do-jin. When he reveals his true identity as Choi Seung-man (the alias), Do-jin realizes he has been outwitted by the man who was his own driver. While the initial prosecution case based on circumstantial evidence begins to collapse, Do-jin ultimately confesses to killing Seung-man when pressed, securing his conviction and life sentence.

Foreshadowing: The build-up of evidence through Seok-jin's infiltration leads to this confrontation.

  • courtroom
  • testimony
  • confession
  • verdict
  • conviction
Q8

What does it mean that Seok-jin keeps Ha-yeon's ring and photo at the end?

At the end, Seok-jin returns to performing as a magician while keeping Ha-yeon's ring and a photo of her close by as a constant reminder of what he lost and what he sacrificed for revenge. This symbolizes that while he achieved justice and closure, his wounds remain open. The bittersweet ending shows he has moved on with his life but remains haunted by the memory of his lost love and unborn child.

Foreshadowing: Earlier, Seok-jin chooses not to read Ms. Sung's letter, instead treasuring Ha-yeon's memory.

  • ring
  • photo
  • memory
  • ending
  • closure
  • sacrifice
Q9

What happens to Seung-man in the story and why does Do-jin confess to killing him?

Seung-man is actually Seok-jin's alias, Choi Seung-man is the false identity he adopts to infiltrate Do-jin's operation. When Do-jin is on trial for murder, he initially claims innocence regarding Seung-man's disappearance. However, under pressure in court, Do-jin confesses to killing Seung-man (meaning Seok-jin), realizing his attempt to silence the threat has failed. This confession seals his fate and leads to his life sentence.

Foreshadowing: The tension between Seok-jin and Do-jin throughout the infiltration builds to this revelation.

  • seung-man alias
  • confession
  • murder charge
  • do-jin confession
Q10

Why does Seok-jin burn every bank note he receives as a taxi driver?

Seok-jin burns every bill he receives to test whether it is counterfeit. Real money burns differently than fake currency, and this method allows him to identify counterfeit notes circulating in Seoul. This practice not only helps him detect the network but also serves as a metaphor for his destructive approach to justice, destroying the false to uncover the truth.

Foreshadowing: The discovery of a counterfeit note on the street two years after Ha-yeon's death sparked his revenge path.

  • burning money
  • counterfeit test
  • taxi driver
  • investigation method
Q11

What is the significance of Nam Do-jin's stone mansion in the story?

Nam Do-jin lives in a stone mansion in Seoul, which serves as both his home and the headquarters of his counterfeit operation. The cold, imposing structure reflects his personality and the secrets hidden within. Seok-jin embeds himself there as a driver, using the close quarters to observe Do-jin's movements and gather evidence. The mansion becomes the central location for the cat-and-mouse tension between the two men.

Foreshadowing: The mansion is introduced as the place where Seok-jin will conduct his infiltration.

  • stone mansion
  • nam do-jin
  • headquarters
  • seoul setting
Q12

What happens to Ha-yeon's unborn child in the story?

Ha-yeon was pregnant with Seok-jin's child when she was murdered. The death of his pregnant fiancée and unborn child becomes the primary motivation for Seok-jin's relentless quest for revenge. The loss of this unborn child represents the ultimate sacrifice and drives the emotional weight of the entire narrative, making Seok-jin's vengeance not just about justice but about protecting the memory of his family.

Foreshadowing: The marriage and pregnancy are established early, making Ha-yeon's death devastating.

  • pregnancy
  • unborn child
  • motivation
  • loss
  • family
Q13

Why does the prosecution's case nearly collapse in court?

The prosecution's case against Do-jin relies heavily on circumstantial evidence, Seung-man's severed finger and blood from Ms. Sung's head. Without direct evidence connecting Do-jin to Seung-man's death, the judge warns an acquittal is likely. The case only succeeds when Do-jin himself confesses under pressure, unable to maintain his innocence when confronted directly by Seok-jin.

Foreshadowing: The tension builds as the prosecutor struggles to prove the connection.

  • court case
  • circumstantial evidence
  • acquittal
  • confession

Movie threads

More Movies Like The Tooth and the Nail, by Mood & Story

Curated lists built around what makes The Tooth and the Nail tick: the same mood, the same kind of story or the same emotional payoff. Each list explains why these movies belong together.

Grief-Fueled Revenge Thrillers like The Tooth and the Nail

When love is lost to violence, a calculated quest for vengeance begins. If you liked The Tooth and the Nail, explore more movies where a devastating loss ignites a methodical and dangerous quest for answers. These similar thrillers focus on calculated revenge, heavy emotional weight, and the uncovering of hidden conspiracies, delivering a tense and somber viewing experience.

  • revenge-driven
  • somber
  • calculated
  • tense
  • gripping
  • melancholic
  • Tone: dark, somber, revenge-driven
  • Pacing: steady, methodical
Why these movies?

The story pattern: The narrative follows a clear, tragic inciting event that sets a morally grounded but emotionally broken character on a path of investigation. The pacing is steady and deliberate, mirroring the protagonist's careful planning as they infiltrate or expose a corrupt system. The climax delivers a form of justice, but the resolution is inherently bittersweet, as the personal cost of the journey is permanent.

Why they belong together: These movies are grouped by their shared emotional core: a devastating loss that fuels a methodical, rather than explosive, revenge plot. They emphasize tension built through calculation over chaos, a consistently dark and somber tone, and a finale where victory is hollow, defined by the grief that started it all.

Slow-Burn Conspiracy Thrillers like The Tooth and the Nail

A tense, deliberate unraveling of secrets that powerful people want buried. Fans of The Tooth and the Nail will appreciate these similar movies featuring a steady-paced investigation into a dark conspiracy. These selections share a gripping, tense mood, a methodical pacing that builds dread, and themes of betrayal and hidden identities for a suspenseful experience.

  • gripping
  • suspenseful
  • tense
  • calculated
  • conspiracy
  • paranoia
  • Tone: dark, tense, suspenseful
  • Pacing: steady, slow-burn
Why these movies?

The story pattern: Stories in this thread typically begin with a single, unexplained event that leads a protagonist down a rabbit hole. The plot unfolds linearly but deliberately, with each discovery increasing the stakes and the sense of paranoia. The central conflict is against a shadowy, organized force, and survival depends on outthinking rather than outfighting the opposition.

Why they belong together: These films are united by their specific pacing and mood. They share a steady, slow-burn approach to building tension, a dark and suspenseful atmosphere, and a narrative focus on the meticulous process of exposing a hidden conspiracy, creating a consistent vibe of calculated dread.

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Every angle

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