Story Structure — 5 Plot Phases
A House Built For Control
Mary welcomes Kelly to a highly automated home designed and engineered by Mary. Jiao's complaint and news about the Diablo Killer introduce unease beneath the domestic setting.
Key Events
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Smart Home Introduction — Mary welcomes Kelly to the home she designed and engineered. Characters: Mary, Kelly
Location: Newly completed smart home
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House Demonstration — The house responds to commands and controls lights, windows, and appliances. Characters: Mary, Kelly
Location: Smart home
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Neighbor's Complaint — Jiao complains that a construction truck damaged her flowerbed and brings a welcome gift. Characters: Mary, Jiao
Location: Smart home entrance
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Diablo Killer Report — News reports describe a serial killer targeting young brunette women. Characters: Mary, Kelly, Robert
Location: Smart home
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Survivor's Case — The reports mention Darlene Horan, who survived an attack blind and severely injured. Characters: Mary, Kelly
Location: Smart home
The Trail Without Return
Kelly enters a forest trail alone despite warnings. Her belongings and partial dental evidence are later found near a crime scene, leading to her presumed death.
Key Events
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Kelly Takes The Trail — Kelly goes into a forest trail alone despite warnings. Characters: Kelly, Robert, Mary
Location: Forest trail
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Evidence Near Crime Scene — Kelly is presumed dead after belongings and partial dental evidence are found. Characters: Mary, Robert
Location: Forest crime scene
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Shared Devastation — Mary and Robert are devastated after Kelly is presumed dead. Characters: Mary, Robert
Location: Smart home
Evidence And Doubt
Mary searches through case materials and develops a theory involving construction work, vans, forests, and murders across states. Agent Selena Wall cautions her against unsupported conclusions.
Key Events
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Evidence Search Begins — Mary searches evidence, ashes, and reports for links to the killer. Characters: Mary
Location: Smart home's basement
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FBI Construction Theory — Agent Selena Wall explains that the FBI suspects practical construction experience. Characters: Mary, Agent Selena Wall
Location: Investigation meeting place
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Mary's Operating Theory — Mary connects work vans, forest locations, and murders across different states. Characters: Mary, Agent Selena Wall
Location: Investigation meeting place
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Theory Rejected — Agent Selena Wall warns Mary against inventing theories. Characters: Mary, Agent Selena Wall
Location: Investigation meeting place
The Sealed Smart Home
Mary's investigation becomes an obsession in the basement, while Robert grows alarmed. She eventually refuses to answer and locks him out using the home's security systems.
Key Events
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Basement Obsession — Mary isolates herself while investigating security technology and the case. Characters: Mary, Robert
Location: Smart home's basement
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Robert Locked Out — Mary refuses to answer and uses the smart home to lock Robert outside. Characters: Mary, Robert
Location: Smart home
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Robert Calls For Help — Robert calls Agent Selena Wall and seeks help from Jiao. Characters: Robert, Agent Selena Wall, Jiao
Location: Outside the smart home
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Forced Property Entry — Robert, Agent Selena Wall, and Jiao enter the property. Characters: Robert, Agent Selena Wall, Jiao
Location: Smart home
The Diablo Confrontation
Robert, Jiao, and Agent Selena Wall enter the property and find Mary gravely wounded. Mary identifies the attacker as Kelly's killer before confronting him and questioning his origins.
Key Events
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Mary Found Wounded — They find Mary gravely wounded inside the property. Characters: Mary, Robert, Agent Selena Wall, Jiao
Location: Smart home
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Mary Identifies Attacker — Mary says the attacker is the man who killed Kelly and urges a backup call. Characters: Mary, Agent Selena Wall, Robert, Jiao
Location: Smart home
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Killer Confronts Mary — Mary faces the nameless killer in a violent confrontation. Characters: Mary
Location: Smart home
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Questions About Diablo — Mary interrogates the killer about his parents, Sarah, childhood, and the name Diablo. Characters: Mary
Location: Smart home
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Violent Confrontation Ends — The story reaches its violent endpoint after Mary's interrogation of the killer. Characters: Mary
Location: Smart home