Story Structure — 5 Plot Phases
Blood on the Evidence
The film opens with Simone and Eddie competing in a flesh-cutting trap. Hoffman frames Strahm while investigators connect the new murder to an older case.
Key Events
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The Lender Balance Trap — Simone and Eddie compete by cutting flesh to balance their scales. Characters: Simone, Mark Hoffman
Location: Predatory lenders' game room
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Simone Wins the Contest — Simone cuts off her arm and survives while Eddie is killed. Characters: Simone, Mark Hoffman
Location: Predatory lenders' game room
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Hoffman Plants Strahm Evidence — Hoffman uses Strahm's severed hand to plant fingerprints at the scene. Characters: Mark Hoffman
Location: Strahm's death scene
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The Autopsy Blade Connection — The blade from Eddie's remains matches the earlier Seth Baxter case. Characters: Dan Erickson
Location: Autopsy room
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The Investigation Reopens — Erickson reopens the investigation and analyzes the recovered videotape. Characters: Dan Erickson
Location: FBI investigation office
The Zoo Test Begins
Hoffman obtains John's envelopes and begins William Easton's punishment in an abandoned zoo. William loses his janitor and is forced through increasingly personal choices.
Key Events
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Hoffman Claims the Envelopes — Hoffman demands photographs of the next test subjects from Jill. Characters: Mark Hoffman, Jill Tuck
Location: Jill's clinic
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The Zoo Game Begins — William and the janitor are suspended while vises crush them as they breathe. Characters: William Easton, Janitor, Mark Hoffman
Location: Abandoned zoo
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Hank Dies in the Vise — The vise kills William's janitor, forcing William to continue alone. Characters: William Easton, Janitor
Location: Abandoned zoo
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The Aquarium Choice — William saves Addy while Allen hangs from a barbed-wire noose. Characters: William Easton, Addy, Allen
Location: Zoo aquarium
Choices Beneath the Glass
William faces the aquarium, boiler-room, and roundabout tests while Tara, Brent, and Pamela observe. Each trial exposes the human cost of William's insurance decisions.
Key Events
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Debbie's Boiler Test — Debbie attacks William for a key hidden inside his body. Characters: William Easton, Debbie
Location: Zoo boiler room
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The Speargun Fires — William fights Debbie, but the device kills her before she can escape. Characters: William Easton, Debbie
Location: Zoo boiler room
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The Rotating Roundabout — William must choose which two of six chained subordinates survive. Characters: William Easton, Mark Hoffman
Location: Zoo roundabout enclosure
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The Two Survivors Chosen — William can save only two people from the shotgun mechanism. Characters: William Easton, Mark Hoffman
Location: Zoo roundabout enclosure
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The Family Watches — Tara, Brent, and Pamela watch William's tests from opposite enclosures. Characters: Tara, Brent, Pamela Jenkins
Location: Animal enclosures below the observation room
The Investigator's Discovery
Erickson brings Hoffman to the audio lab and uncovers evidence connected to Strahm's death. Hoffman kills the investigators after the recording exposes his voice.
Key Events
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Erickson Calls Hoffman — Erickson calls Hoffman after obtaining the videotape and learning Strahm is dead. Characters: Mark Hoffman, Dan Erickson
Location: Audio lab
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Hoffman's Voice Revealed — The recording is unscrambled and reveals Hoffman's voice. Characters: Mark Hoffman, Dan Erickson
Location: FBI audio lab
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The Audio Lab Murders — Hoffman kills Erickson, Perez, and a technician after his identity is exposed. Characters: Mark Hoffman, Dan Erickson
Location: FBI audio lab
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The Letter Is Found — Pamela finds Hoffman's letter to Amanda and gives it to Jill. Characters: Mark Hoffman, Pamela Jenkins, Jill Tuck, Amanda Young
Location: Zoo observation room
Judgment in the Cages
Pamela's discovery of Hoffman's letter gives Jill the leverage to spring John's final trap. William confronts Harold's family, whose decision ends his game while Hoffman escapes.
Key Events
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Jill Traps Hoffman — Jill restrains Hoffman and locks John's final trap onto his head. Characters: Jill Tuck, Mark Hoffman
Location: Zoo observation room
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William Meets Pamela — William reaches the cages and reunites with his sister Pamela. Characters: William Easton, Pamela Jenkins, Tara, Brent
Location: Final zoo cages
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The Acid Decision — John's message makes Tara responsible for deciding William's fate. Characters: William Easton, Pamela Jenkins, Tara, Brent
Location: Final zoo cages
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Brent Pulls the Lever — Brent releases the platform, which kills William by injecting acid into him. Characters: William Easton, Pamela Jenkins, Tara, Brent
Location: Final zoo cages
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Hoffman Escapes the Trap — Hoffman breaks his wrist, escapes, and survives with his cheek torn open. Characters: Mark Hoffman, Jill Tuck
Location: Zoo observation room
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The Legacy Continues — Hoffman survives John's posthumous test, leaving the conflict unresolved. Characters: Mark Hoffman, Jill Tuck, John Kramer / Jigsaw
Location: Abandoned zoo