Mouse: Season 1

Season 1 overview

A national serial-killing case creates fear and exposes a possible psychopathy-related genetic question. Go Moo-chi's personal hatred of Han Seo-jun intensifies the investigation.

Key story beats

1. Campsite Massacre — A family of four is attacked at a campsite by a serial killer, while one boy survives the ambush.
2. Psychopathy Gene Test — A gene test is performed on an unborn fetus connected to the Head Hunter case, forcing the baby's mother to make a difficult choice.
3. Moo Chi's Prison Threat — Go Moo-chi visits Han Seo-jun in prison and vows to kill him and make his son suffer.
4. Prison Murder Message — Na Chi Kook is found stabbed in prison with a blood-written message, and his watch later appears at a grape farm murder site.
5. Grandmother's Discovery — Oh Bong-yi's Grandmother discovers something dangerous while working as a cleaning lady connected to settlement money.
6. Church Finger Clue — After Oh Bong-yi's Grandmother is murdered, a severed finger is found at a church, and Go Moo-chi becomes suspicious of Sung Yo-han.
7. Han Kook Kidnapping — Kim Han-kook is kidnapped, and the kidnapper demands that Go Moo-chi discover the reason for the kidnapping before a deadline.
8. Live Broadcast Hunt — A one-hour live broadcast seeks information to save Kim Han-kook, while tips from former victims help Go Moo-chi narrow the suspects.
9. Moo-won's Murder — Go Moo-won is brutally murdered, causing Go Moo-chi to abandon his investigation temporarily and turn to drinking.
10. Yo-han's Family Lead — After recovering from his despair, Go Moo-chi investigates Oh Bong-yi's Grandmother's case and finds information about Sung Yo-han and his mother.
11. Brain Surgery — Sung Yo-han suffers a gunshot wound, while Jung Ba-reum undergoes brain surgery and later experiences memory loss.
12. A New Investigation — One year later, Go Moo-chi joins a criminal-evidence team, while Jung Ba-reum works at a small precinct and discovers a dead body on his first day.
13. Unfamiliar Flashbacks — Jung Ba-reum's intuition helps Go Moo-chi investigate the knot-related mystery, but Jung Ba-reum is troubled by unfamiliar flashbacks.
14. The Brain Revelation — Jung Ba-reum learns a shocking story about his brain surgery and is tormented by memories associated with Sung Yo-han.
15. Violent Impulses — Jung Ba-reum becomes increasingly violent and develops an urge to kill, while another murder follows the earlier serial-murder pattern.

Seasons

• Season 1

Interactive Features

• Character Relationship Map — Explore character connections and alliances for Mouse Season 1.
• AI Plot Analysis — AI-powered story structure breakdown and character arc tracking.
• Full Series Character Map — Cross-season character evolution and relationship changes.

Episode Guide