Story Structure — 4 Plot Phases
The Crash and Discovery
An astronaut crashes and triggers a remote self-destruct. Scientists later uncover an alien infection in the wreckage.
Key Events
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Astronaut Crash Landing — Astronaut crashes, triggers remote self-destruct via radio. Location: Space/Ship
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Scientists Discover Infection — Scientists find astronaut infected by alien lifeform. Characters: Steve Curan, Donna
Location: Washington Lab
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Severed Arm Found on Beach — Paul and Marta discover a severed human arm. Characters: Paul Lawrence, Marta Farnstrom
Location: California Beach
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California Beach — Where the severed arm is initially discovered. Characters: Paul Lawrence, Marta Farnstrom
Location: California Beach
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Washington Lab — Base of operations for the scientists. Characters: Steve Curan, Donna
Location: Washington Lab
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Severed Human Arm — The alien entity that drives the plot. Characters: Paul Lawrence, Marta Farnstrom
Location: California Beach
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Self-Destruction Mechanism — Device activated remotely to destroy the crashed ship. Location: Space/Ship
The Possessed Arm
A severed arm found by a couple murders a landlady and possesses the student. The hand begins a violent rampage across town.
Key Events
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Severed Arm Found on Beach — Paul and Marta discover a severed human arm. Characters: Paul Lawrence, Marta Farnstrom
Location: California Beach
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Hand Murders Landlady — The hand kills the landlady and possesses Paul. Characters: Paul Lawrence
Location: Paul's Residence
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Paul Possessed and Attacks — Possessed Paul attacks Marta and a local shop owner. Characters: Paul Lawrence, Marta Farnstrom
Location: Town Streets
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Scientists Arrive in California — Curan and team travel to investigate the murders. Characters: Steve Curan, Donna
Location: California
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Fingerprints Discovered — Scientists find astronaut fingerprints on the landlady. Characters: Steve Curan, Sheriff Townsend
Location: Crime Scene
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California Beach — Where the severed arm is initially discovered. Characters: Paul Lawrence, Marta Farnstrom
Location: California Beach
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Paul's Residence — Site of the landlady's murder and Paul's possession. Characters: Paul Lawrence
Location: Paul's Residence
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Severed Human Arm — The alien entity that drives the plot. Characters: Paul Lawrence, Marta Farnstrom
Location: California Beach
Investigation and Accusation
Scientists arrive to investigate, linking the crimes to the crashed astronaut. The sheriff suspects the student, who fights to regain control.
Key Events
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Fingerprints Discovered — Scientists find astronaut fingerprints on the landlady. Characters: Steve Curan, Sheriff Townsend
Location: Crime Scene
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Sheriff Suspects Paul — Sheriff Townsend arrests Paul based on evidence. Characters: Sheriff Townsend, Paul Lawrence
Location: Police Station
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Paul Captures the Hand — Paul regains lucidity and traps the alien hand. Characters: Paul Lawrence
Location: City Dump
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Hand Destroyed by Cats — Paul stabs the hand, which is then eaten by cats. Characters: Paul Lawrence
Location: City Dump
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Paul Freed from Influence — The alien possession ends, freeing Paul. Characters: Paul Lawrence
Location: City Dump
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City Dump — Location where Paul confronts and destroys the hand. Characters: Paul Lawrence
Location: City Dump
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Police Station — Where Paul is questioned and suspected. Characters: Sheriff Townsend, Paul Lawrence
Location: Police Station
Destruction and Aftermath
The student traps and destroys the alien hand at a dump. The couple survives, but a post-credits scene hints the threat remains.
Key Events
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Paul Freed from Influence — The alien possession ends, freeing Paul. Characters: Paul Lawrence
Location: City Dump
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Paul and Marta Reunite — Paul and Marta survive and reconcile. Characters: Paul Lawrence, Marta Farnstrom
Location: Town
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Scientists Return to Washington — Curan and Donna depart California. Characters: Steve Curan, Donna
Location: Washington
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Federal Transport Opens Box — Agents transporting the hand open the container. Location: Transport Vehicle
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Empty Box Revealed — The box is found empty, implying the hand escaped. Location: Transport Vehicle
After an astronaut space capsule is detonated in orbit, with the astronaut begging to be killed, a teenager couple finds a severed arm on a remote beach. The boy takes the arm home, where it becomes animate and the alien force which animates it soon possesses his mind as well.