Story Structure — 4 Plot Phases
A Survivor and an Unresolved Arrest
A survivor's memories of escaping the Butcher's lair offer police possible route clues. The arrest of Keung ends violently, leaving the framing claim and case unresolved.
Key Events
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Survivor Escapes the Lair — A survivor recalls escaping after being tortured by the Butcher.
Location: Hidden lair
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Route Clues Recalled — Memories of water, a bridge, and a staircase may help police locate the Butcher.
Location: Escape route
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Keung Arrest Turns Violent — A man insists Keung was framed, but the arrest ends in violence and leaves the case unresolved.
Location: Arrest scene
The Sleuths Enter the Investigation
A police murder and a rusted gun connect several old cases. Jun's claims about the Chosen Sleuths seem delusional at first, but his leads direct police to hidden bodies and evidence.
Key Events
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Four-Year Case Reopens — Four years later, a police officer is found murdered.
Location: Murder scene
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Rusted Gun Connects Cases — A rusted gun links the murder to an earlier robbery and another police killing.
Location: Investigation sites
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Jun Names the Sleuths — Jun claims the Chosen Sleuths pursue killers and attempt to solve crimes themselves.
Location: Police investigation
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Clues Lead to Hidden Evidence — Clues from Jun's investigations lead police to bodies and concealed evidence.
Location: Sewers and other locations
Old Cases Turn Deadly
The Sleuths pursue suspects such as Baldie, and an attack at a boat shelter raises the stakes. Investigators begin connecting the group to the Butcher case and suspect that the cases have been deliberately intertwined.
Key Events
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Sleuths Pursue Baldie — The Sleuths target suspects in old cases, including Baldie. Characters: Baldie
Location: Unspecified
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Boat Shelter Attack — The Sleuths' pursuit turns deadly when a woman is attacked at a boat shelter.
Location: Boat shelter
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Butcher Case Connection — Investigators suspect the Sleuths connect to the Butcher case and that the Butcher's daughter belongs to the group.
Location: Investigation sites
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Cases Deliberately Intertwined — Evidence suggests the Butcher, Devil Cop, and Sleuths cases were deliberately connected. Characters: Lee Chun
Location: Investigation
The Hidden Leader and Unfinished Confrontation
Jun argues that Lee Chun was framed, while revelations identify Fong Lai Shun as the Sleuths' hidden leader and a manipulator of evidence. Police and SWAT close in, but the violent confrontation and boat explosion occur before the available account reaches a clear resolution.
Key Events
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Devil Cop Framing Theory — Jun argues Lee Chun was framed with a stolen gun and altered shoelace evidence. Characters: Lee Chun
Location: Investigation
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Fong Revealed as Leader — Fong Lai Shun is revealed as the Sleuths' hidden leader and as the person framing others, including Auyeung. Characters: Fong Lai Shun, Auyeung Kim
Location: Sleuths investigation
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Police and SWAT Close In — Police and SWAT close in as the Sleuths are caught in a violent confrontation. Characters: Fong Lai Shun, Auyeung Kim
Location: Confrontation site
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Boat Explodes as Escape Unfolds — Auyeung escapes aboard a boat, which is then blown up; the account ends amid the ongoing confrontation. Characters: Auyeung Kim
Location: Boat