Story Structure — 4 Plot Phases
The Experiment Gone Wrong
Professor Sorensen injects Sam's baboon with an experimental drug, causing it to go berserk. Sam refuses to euthanize the animal, leaving it alive overnight for a scheduled necropsy.
Key Events
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Experimental Injection — Professor injects Sam's baboon with an experimental aggression-inhibiting drug. Characters: Sam, Shakma
Location: Medical Lab
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Berserk Awakening — Shakma awakens and goes berserk, rejecting the drug's intended effect. Characters: Shakma
Location: Medical Lab
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Euthanasia Refusal — Sam refuses to euthanize the unconscious baboon and leaves him alive. Characters: Sam, Shakma
Location: Medical Lab
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Necropsy Delay — Sorensen insists on a necropsy, leaving Shakma alive overnight. Characters: Shakma
Location: Morgue
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LARP Setup — Sorensen organizes a live-action game to reach Kim on the top floor. Characters: Sam, Tracy, Gary, Bradley, Richard, Kim
Location: Building
The LARP Turns Deadly
Sorensen locks the building and forces students into a live-action game. Shakma awakens and begins hunting the participants, killing Bradley and Richard while Sorensen investigates.
Key Events
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LARP Setup — Sorensen organizes a live-action game to reach Kim on the top floor. Characters: Sam, Tracy, Gary, Bradley, Richard, Kim
Location: Building
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Building Lockdown — Fire alarm disabled and exits locked to trap players inside. Location: Building
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Bradley's Death — Shakma kills Bradley when he ventures into the fifth-floor specimen room. Characters: Shakma, Bradley
Location: Specimen Room
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Richard's Investigation — Richard investigates Bradley's disappearance and is killed by Shakma. Characters: Shakma, Richard
Location: Hallways
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Sorensen's Demise — Sorensen investigates and is killed by Shakma while jamming the elevator. Characters: Shakma
Location: Elevator
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Elevator Jammed — Sam and Tracy discover Sorensen's body blocking the elevator doors. Characters: Sam, Tracy
Location: Elevator
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Stairwell Escape — Sam attempts to tame Shakma but flees with Tracy up the stairs. Characters: Sam, Tracy, Shakma
Location: Stairs
Survival and Carnage
Sam and Tracy attempt to escape and fight back using a strobe light. Despite temporary successes, Shakma systematically eliminates Gary and Tracy in the upper floors.
Key Events
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Stairwell Escape — Sam attempts to tame Shakma but flees with Tracy up the stairs. Characters: Sam, Tracy, Shakma
Location: Stairs
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Strobe Light Trap — Tracy blinds Shakma temporarily and holds the specimen room door shut. Characters: Tracy, Shakma
Location: Electricity Lab
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Richard's Body Discovery — Sam finds Richard's body, gets shocked, and narrowly escapes with Tracy. Characters: Sam, Tracy, Shakma
Location: Specimen Room
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Gary's Elevator Death — Gary is killed in the elevator, allowing Shakma to reach the sixth floor. Characters: Shakma, Gary
Location: Elevator
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Tracy's Death — Tracy is killed by Shakma in the sixth-floor restroom shortly after. Characters: Shakma, Tracy
Location: Restroom
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Kim's Warning — Sam warns Kim without revealing Richard's death and arms himself. Characters: Sam, Kim
Location: Top Floor
The Final Stand
Kim dies after finding Richard's body. Overcome by grief, Sam sets a lethal trap in the incinerator room, resulting in a mutual destruction that ends the nightmare.
Key Events
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Kim's Warning — Sam warns Kim without revealing Richard's death and arms himself. Characters: Sam, Kim
Location: Top Floor
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Laura's Departure — Laura drives away after Kim leaves a note for Sam. Characters: Laura
Location: Parking Lot
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Kim's Death — Kim finds Richard's body and is killed by Shakma. Characters: Shakma, Kim
Location: Hallway
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Sam's Grief and Resolve — Sam finds bodies, grieves Tracy, and decides to kill Shakma. Characters: Sam
Location: Office
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Electrocution Trap — Sam sets an electrocution trap, but Shakma injures him mortally. Characters: Sam, Shakma
Location: Incinerator Room
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Incinerator Climax — Sam lures Shakma into the incinerator, burning him to death. Characters: Sam, Shakma
Location: Incinerator
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Sam's Peaceful End — Sam collapses, declares victory, and dies peacefully. Characters: Sam
Location: Hallway
A murderous baboon escapes from a laboratory and roams the research building, and begins to kill some teenagers who are also in the building playing a Dungeons-and-Dragons type game.