Story Structure — 4 Plot Phases
Shadows in the Dark
The film opens with a factory attack that establishes the entity's rules. Martin witnesses his mother Sophie interacting with an unseen presence, prompting Rebecca to intervene.
Key Events
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Factory Encounter — Esther and Paul encounter a shadow entity in the dark that kills Paul.
Location: Textile Factory
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Sophie's Secret — Martin sees Sophie talking to an unseen figure in the dark.
Location: Family Home
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School Intervention — Rebecca is called to school after Martin falls asleep; CPS questions her.
Location: School Nurse Office
Unearthing the Past
Rebecca discovers Diana's name scratched into her floor and uncovers medical records revealing Sophie's childhood hospitalization. The entity's tragic origin and light dependency are exposed.
Key Events
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School Intervention — Rebecca is called to school after Martin falls asleep; CPS questions her.
Location: School Nurse Office
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House Confrontation — Rebecca argues with Sophie over her untreated mental health and takes Martin away.
Location: Family Home
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Diana's Manifestation — Rebecca wakes to find Diana's name scratched into her floor and remembers childhood trauma.
Location: Rebecca's Apartment
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Childhood Trauma — Flashback reveals Diana's fatal exposure to intense light during treatment.
Location: Mental Hospital
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Father's Death — Diana reveals her past killing of Rebecca's father when he tried to help Sophie.
Location: Family Home
Lights Out Crisis
Diana sabotages the neighborhood power, trapping Rebecca, Martin, and Bret in the house. The group is hunted through the dark, leading to a desperate basement siege.
Key Events
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Medical Discovery — Rebecca finds records revealing Sophie's childhood hospitalization and Diana's origin.
Location: Paul's Office
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Diana's Origin — Sophie explains Diana's tragic death by experimental light treatment to Martin.
Location: Family Home
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Martin's Flight — Martin becomes terrified of Diana and flees to Rebecca's apartment.
Location: Family Home
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Group Intervention — The trio confronts Sophie about Diana, who secretly begs Rebecca for help.
Location: Sophie's House
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Power Outage — Diana cuts neighborhood power, trapping the group and rendering their lights useless.
Location: Sophie's House
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Childhood Trauma — Flashback reveals Diana's fatal exposure to intense light during treatment.
Location: Mental Hospital
Breaking the Tether
Police arrive but are quickly eliminated. Rebecca is injured on the stairs, and Sophie realizes she is the supernatural anchor keeping Diana alive. Sophie sacrifices herself to end the haunting.
Key Events
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Power Outage — Diana cuts neighborhood power, trapping the group and rendering their lights useless.
Location: Sophie's House
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Basement Trap — Diana traps Rebecca and Martin in the basement; they find a black-light.
Location: Basement
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Bret's Escape — Bret escapes Diana's attack by using his car headlights to drive away.
Location: Driveway
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Sophie's Confrontation — Sophie tries to reason with Diana but is knocked unconscious.
Location: Living Room
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Police Arrival — Bret returns with police who free the siblings but encounter Diana.
Location: Basement
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Officer Massacre — Diana kills the police officers when they attempt to pursue her shadow.
Location: Basement
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Rebecca's Return — Rebecca goes back for Sophie but is injured by Diana on the stairs.
Location: Staircase
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Diana's Confession — Diana reveals she killed Rebecca's father for trying to help Sophie.
Location: Staircase
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Sophie's Sacrifice — Sophie realizes she is Diana's tether and shoots herself to destroy the entity.
Location: Living Room
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Entity Vanishes — Diana disappears completely as Sophie's body falls.
Location: Living Room
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Ambulance Aftermath — Bret comforts the siblings outside; a light flickers but Diana is gone.
Location: Ambulance
A couple dealing with some major relationship issues are trapped in an elevator with a perfect, or not so perfect, stranger.