Story Structure — 4 Plot Phases
The False Lead
Inspector Han arrests a mentally disabled suspect who falsely claims to be a murderer. The team investigates the alleged victim, finds him alive, and releases the suspect, wasting valuable time.
Key Events
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Arrest of Wu Zai-Jan — Wu is arrested with strange makeup and taken to the precinct for questioning.
Location: Police Department Hall
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Interrogation Room — Han questions Wu, who claims to have murdered Cheng Fai and calls detectives wolves.
Location: Police Precinct
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Cheng Fai's Apartment — Team investigates the alleged crime scene but finds the supposed victim alive.
Location: Cheng Fai's Apartment
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Precinct Discharge — Detectives release Wu due to mental disability, wasting valuable investigative time.
Location: Police Precinct
The Deadly Mistake
Cheng Fai is found murdered with a bizarre ritualistic detail. Han's team realizes their earlier release was a catastrophic error and decides to cover up their initial investigative steps.
Key Events
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Precinct Discharge — Detectives release Wu due to mental disability, wasting valuable investigative time.
Location: Police Precinct
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Han's Personal Life — Han's troubled marriage and strained bond with his autistic son are revealed.
Location: Han's Home
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Park Murder Discovery — Team discovers Cheng Fai dead in a park with seven stones placed in his stomach.
Location: City Park
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Realization of Mistake — Detectives recognize that releasing Wu was a catastrophic investigative error.
Location: Police Precinct
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Cover-up Decision — The team agrees to conceal their initial investigative steps to avoid scrutiny.
Location: Police Precinct
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Mental Hospital Connection — Investigation reveals Wu is an escaped mental-hospital intern linked to a drawing intern.
Location: Police Precinct
Fairy-tale Shadows
The investigation shifts to a mental hospital, uncovering a connected intern and a series of murders mimicking fairy tales. The team races against time to decode the killer's pattern.
Key Events
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Mental Hospital Connection — Investigation reveals Wu is an escaped mental-hospital intern linked to a drawing intern.
Location: Police Precinct
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Intern's Drawings — The intern creates detailed drawings that hint at the killer's ritualistic patterns.
Location: Mental Hospital Cell
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Second Fairy-tale Murder — Another victim is found dead in a murder that deliberately mimics a fairy tale.
Location: Unknown Location
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Race Against Time — Detectives work urgently to predict the killer's next target and location.
Location: City Streets
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Tracking the Intern — Team locates the drawing intern and questions her about Wu's escape and motives.
Location: Mental Hospital
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Wu's Escape Route — Investigators trace Wu's escape path through the city to narrow the search area.
Location: City Outskirts
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Killer's Pattern Revealed — Team connects all murders to specific fairy tales, identifying the killer's psychological motive.
Location: Police Precinct
Final Confrontation
As the killer targets the final victim, Han and his team set a trap. A tense standoff ensues, leading to the killer's capture and Han's personal reckoning.
Key Events
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Killer's Pattern Revealed — Team connects all murders to specific fairy tales, identifying the killer's psychological motive.
Location: Police Precinct
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Han's Marital Crisis — Han's wife confronts him about his work obsession and neglect of their son.
Location: Han's Home
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Final Victim Warning — Killer leaves a clear warning and target for the final fairy-tale murder.
Location: Abandoned Building
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Police Ambush — Detectives deploy a tactical trap based on the decoded killer pattern.
Location: Abandoned Building
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Killer's Escape — Killer evades the initial trap, forcing the team to adjust their strategy.
Location: Abandoned Building
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Intern's Confession — Intern reveals Wu's final destination and the killer's true identity through her sketches.
Location: Police Precinct
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Confrontation at Park — Final standoff occurs between Han and the killer over the last victim.
Location: City Park
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Aftermath and Reflection — Team secures the case while Han reflects on his personal and professional failures.
Location: Police Precinct
When a bloodied and incoherent Jun (Wang Baoqiang) confesses to five murders that have not occurred, the police assume that he's mentally unstable and ignore his claims. Police detective Han (Lau Ching-wan) is investigating a series of gruesome murders, but soon discovers that all is not as it seems and that not only are the murders connected, but that Jun is tied to them in some way.