Mouse (2021) — AI Story Visualization

Plot Analysis Summary

A single-season psychological crime narrative in which serial-killing investigations gradually become an identity, memory, and hidden-organization mystery.

Story Structure — 5 Plot Phases

Season 1: The Head Hunter Mystery

The season opens with a national serial-killing crisis, a campground massacre, and a disturbing genetic test. New murders and deliberately planted clues expand the mystery.

Key Events

• National Serial-Killing Fear — News of an unsolved serial-killing case spreads nationwide and creates widespread fear. Location: The country
• Campground Family Ambush — A family visiting a campsite is attacked by the serial killer, and only one boy survives. Location: A campsite
• Survivor Identifies Suspect — The surviving boy later identifies the prime suspect as the killer. Location: An investigation setting
• Psychopathy Gene Test — A gene test is performed on an unborn fetus connected to the imprisoned killer, forcing the mother to make a decision. Characters: Sung Yo-han Location: A medical setting
• Prison Vengeance Threat — A visitor confronts the imprisoned killer and vows to find the killer's son and make him suffer. Location: Moojin Prison
• Murderer Leaves Leads — New murder victims are discovered, and the culprit leaves clues that appear designed to attract attention. Location: Multiple crime scenes
• Prison Stabbing Message — A prisoner is found with multiple stab wounds, accompanied by a message written in blood. Location: A prison

Season 1: The Kidnapping Broadcast

A kidnapped child becomes the focus of a live broadcast rescue effort. The case intensifies through public tip-offs, prison violence, and the brutal murder of Moo Won.

Key Events

• Watch Links Crime Scenes — A watch previously given as a present is recovered at a grape-farm murder scene, linking the investigation to another crime. Location: A grape farm
• Finger Found at Church — After a grandmother is murdered, a severed finger is found at a church and investigators intensify their inquiry. Location: A church
• Suspicion Falls on Yo-han — Investigators become suspicious of Sung Yo-han, but no conclusive evidence is found at that stage. Characters: Sung Yo-han Location: An investigation setting
• Child Kidnapping Demand — A child is kidnapped, and the kidnapper demands that the reason for the kidnapping be discovered before a deadline. Location: An unspecified location
• Live Broadcast Rescue — An hour-long live broadcast is launched to help save the missing child while tips from former victims flood the station. Location: A broadcast station
• Moo Won Murdered — Moo Won is brutally murdered, causing the investigation to lose momentum while the missing child remains in danger. Location: An unspecified location

Season 1: Surgery and Lost Memory

A gunshot and brain surgery create a major transition, followed by a one-year time jump. New crimes and fragmented memories reopen the identity mystery.

Key Events

• Yo-han Family Inquiry — The investigation into the grandmother's case examines Sung Yo-han and his mother. Characters: Sung Yo-han Location: An investigation setting
• Gunshot and Brain Surgery — Sung Yo-han is critically wounded by a gunshot, while a brain surgery later causes severe memory loss in another central investigation subject. Characters: Sung Yo-han Location: A hospital
• One-Year Time Jump — After a one-year transition, the investigation is reorganized and a new working arrangement begins. Location: A year later
• New Body at Precinct — On the first day at a small precinct, a dead body is accidentally discovered. Location: A small police precinct
• Unfamiliar Flashbacks — Unfamiliar flashbacks and intuitive clues deepen the mystery surrounding Sung Yo-han and the connected murders. Characters: Sung Yo-han Location: An unspecified location
• Brain Surgery Truth — A shocking story behind the brain surgery is uncovered, and the resulting memories become increasingly disturbing. Characters: Sung Yo-han Location: An investigation setting

Season 1: The Hidden Killer

Violent impulses, hallucinated commands, and missing evidence make the investigation increasingly unstable. DNA evidence and related cases challenge the initial assumptions.

Key Events

• Violent Impulses Emerge — The central subject begins acting more violently and experiences an urge to kill, raising questions about the source of those impulses. Characters: Sung Yo-han Location: An unspecified location
• Hallucinated Voice — A voice associated with Sung Yo-han repeatedly urges the central subject to kill, blurring memory, identity, and hallucination. Characters: Sung Yo-han Location: An unspecified location
• Hidden Murder Evidence — After a killing, the central subject goes to the station to surrender but discovers that the body and related evidence have disappeared. Location: A police station
• Rainy-Day Attack — A previously released offender again approaches a vulnerable target during a rainy day, renewing the immediate threat. Location: A rainy outdoor setting
• Weapon DNA Confusion — DNA found on the weapon used in a killing contradicts expectations and confuses the investigation. Location: A forensic investigation setting
• Cat-Killer Investigation — A perceptive child investigates a cat killer in the neighborhood and plans to share the findings before suffering an accident. Location: A neighborhood
• Memories Return — The central subject begins to remember the full chain of events and becomes overwhelmed by guilt. Characters: Sung Yo-han Location: An unspecified location

Season 1: Identity and Confession

Recovered memories expose guilt and reopen the question of Sung Yo-han's responsibility. The Guryeong investigation, Daniel Lee's secret, and the hidden organization converge before the final decision to surrender.

Key Events

• Memories Return — The central subject begins to remember the full chain of events and becomes overwhelmed by guilt. Characters: Sung Yo-han Location: An unspecified location
• Yo-han Role Reconsidered — New doubts emerge about whether Sung Yo-han was the true serial killer, and the demand for an autopsy challenges the existing theory. Characters: Sung Yo-han Location: An investigation setting
• Guryeong Massacre Memory — The Guryeong family massacre is remembered in greater detail, while an investigation into an organization uncovers an unregistered car and a secret concerning Daniel Lee. Characters: Sung Yo-han, Daniel Lee Location: Guryeong
• Accusation at the Station — The investigation identifies the central subject as a killer, while suspicion also falls on an investigator as a possible member of a hidden organization. Characters: Daniel Lee Location: A police station
• Laptop Brings Truth Closer — A laptop and further inquiries bring the investigators closer to the truth, while the search for a missing family member continues. Characters: Daniel Lee Location: An investigation setting
• Final Decision to Surrender — The central subject decides to turn himself in after completing one final mission. Location: An unspecified location
• Broadcast Secret Revealed — During a final broadcast, a long-hidden secret involving a private organization and a covert agent is disclosed. Location: A broadcast station

Story Breakdown

• National Killing Crisis — A serial-killing case creates public fear and establishes the season's central threat.
  • Campground Massacre — A family is attacked at a campsite, leaving one surviving witness.
  • Genetic Moral Choice — A prenatal gene test forces a mother to confront the possibility of psychopathic traits.
• Escalating Crime Trail — New murders, blood messages, physical clues, and a kidnapping expand the investigation.
  • Planted Evidence — The culprit leaves leads and objects at multiple crime scenes.
  • Kidnapping Broadcast — A live broadcast attempts to uncover the kidnapper's motive and save the missing child.
• Personal Devastation — Violence reaches the investigators directly and causes the case to collapse into grief and uncertainty.
  • Moo Won Murder — A brutal murder causes the investigation to lose momentum.
  • Yo-han Investigation — Sung Yo-han and his family become central to the search for an explanation.
• Surgery and Memory — Brain surgery and a one-year time jump transform the investigation into a fragmented-memory mystery.
  • Lost Memory — The surgery produces memory loss and a new phase of uncertainty.
  • Unfamiliar Flashbacks — Intuitive clues and disturbing memories gradually reconnect the present to earlier crimes.
• Identity Reversal — Violent impulses and recovered memories challenge the assumption that the apparent killer is responsible for every crime.
  • Hallucinated Commands — A voice associated with Sung Yo-han urges the central subject toward murder.
  • DNA Contradiction — Forensic evidence from a murder weapon complicates the accepted theory.
• Hidden Organization — The late-season investigation links past massacres, concealed evidence, Daniel Lee's secret, and a covert organization.
  • Guryeong Memories — Recovered memories clarify what happened during the Guryeong family massacre.
  • Final Surrender — The central subject chooses to complete one final mission and turn himself in.

Directed by

Kang Cheol-woo, Choi Joon-bae

Key Cast

• Lee Seung-gi — Jung Ba-reum
• Lee Hee-jun — Go Moo-chi
• Park Ju-hyun — Oh Bong-yi
• Kwon Hwa-woon — Sung Yo-han
• Gyeong Su-jin — Choi Hong-ju