Story Structure — 5 Plot Phases
A Failed Surprise
David unexpectedly visits Jill at her fencing tournament. His mistaken kiss with Melanie causes Jill to leave angrily, and David learns that Jill will attend a party.
Key Events
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David Plans A Surprise Visit — David prompts Jill to wish he were present, then plans an unexpected visit to her fencing tournament. Characters: David, Jill
Location: Phone conversation
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Mistaken Fencing Kiss — David mistakes Melanie for Jill, flirts with her, and receives a kiss before Jill sees them. Characters: David, Jill, Melanie
Location: Fencing tournament
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Jill Rejects David — Jill storms away angrily after witnessing David kiss Melanie. Characters: David, Jill
Location: Fencing tournament area
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Teddy Reveals Party Plans — Teddy tells David that Jill will attend a house party, encouraging David to go there. Characters: David, Teddy
Location: Meeting place
Blackout At The Party
David and Teddy attend the house party, where David searches for Jill and Teddy pursues Melanie. A meteor causes a blackout that briefly produces unexplained visual anomalies.
Key Events
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Meteor Hits Nearby — A meteor lands near the party, and electrical arcs cause a brief blackout. Characters: David, Teddy, Jill, Melanie, Allison
Location: Party house
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Partygoers Miss Anomalies — During the blackout, a mirror image moves out of sync while the revelers continue partying. Characters: David, Teddy, Jill, Melanie, Allison
Location: Party house
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Teddy Pursues Melanie — Teddy tries to charm Melanie, who invites him upstairs after ten minutes. Characters: Teddy, Melanie
Location: Party house
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David Sees Jill Flirting — David spies on Jill flirting with a friend while Allison struggles to fit into the party. Characters: David, Jill
Location: Party house
The House Of Doubles
Melanie encounters a duplicate after sleeping with Teddy. David realizes that duplicates are appearing throughout the house and reenacting the originals' recent actions.
Key Events
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Jill Rejects Apology — David attempts an apology, but Jill becomes angrier and says he makes her feel replaceable. Characters: David, Jill
Location: Party house
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Party Moves Outside — The party moves outside, leaving David, Teddy, Allison, and Melanie inside the house. Characters: David, Teddy, Melanie, Allison
Location: House exterior
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Melanie Meets Her Duplicate — After sex, Teddy finds Melanie's duplicate on the bed; the original Melanie then confronts it. Characters: Teddy, Melanie
Location: Upstairs bedroom
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Duplicates Fill The House — David confirms that duplicates have filled the house and reenact actions performed ten minutes earlier. Characters: David, Teddy, Melanie, Allison
Location: Party house
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Duplicate Violence Begins — An unnamed partygoer and his duplicate violently confront one another, and one kills the other. Characters: David, Teddy, Melanie, Allison
Location: House exterior
Siege Of The Originals
The duplicates repeatedly return during blackouts and become increasingly dangerous. The originals hide in the pool house after several duplicates are murdered.
Key Events
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Duplicates Temporarily Vanish — The duplicates disappear, but later blackouts make them reappear while reenacting increasingly recent actions. Characters: David, Teddy, Melanie, Allison
Location: Party house
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Allison Befriends Her Duplicate — Allison responds to her duplicate with friendship rather than immediate fear or violence. Characters: Allison
Location: Party house
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Originals Hide In Pool House — Teddy warns that his duplicate will become hostile and convinces the originals to hide in the pool house. Characters: David, Teddy, Melanie, Allison
Location: Pool house
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David Knocks Out Himself — When the duplicates reappear, David knocks his own duplicate unconscious and charms Jill's duplicate. Characters: David, Jill
Location: Party house
Merger And Escape
Violence erupts inside the pool house, killing Teddy and others. David chooses Jill's duplicate, Allison embraces her own duplicate, and the final blackout merges originals with doubles.
Key Events
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Duplicates Attack The Pool House — After originals murder several duplicates, the enraged duplicates lay siege to the pool house. Characters: David, Teddy, Melanie, Allison
Location: Pool house
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Pool House Erupts — A blackout brings duplicates inside, causing a crowded fight in which several people die, including Teddy. Characters: David, Teddy, Melanie, Allison
Location: Pool house
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David Chooses Jill's Duplicate — David finds the original Jill and murders her so he can remain with Jill's duplicate. Characters: David, Jill
Location: Party house
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Allison Kisses Her Duplicate — Allison seduces her duplicate, and the two share a kiss before the final blackout. Characters: Allison
Location: Party house
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Final Duplicate Merger — The final blackout causes the duplicates and originals to merge. Characters: David, Jill, Melanie, Allison
Location: Party house
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David And Jill Reunite — David and Jill leave together, reach the pool house, and make out while the survivors disperse. Characters: David, Jill
Location: Pool house
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Meteors Leave Earth — Two meteors pass through the sky and appear to be leaving Earth.
Location: Night sky