Story Structure — 5 Plot Phases
Grief Meets Invention
Cady loses her parents and moves in with Gemma. Gemma's secret robotics project becomes a possible solution to Cady's loneliness.
Key Events
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Cady Loses Her Parents — A car collision kills Cady's parents and leaves her orphaned. Characters: Cady, David
Location: Road
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Cady Moves In With Gemma — Cady is sent to live with her aunt Gemma. Characters: Gemma, Cady
Location: Gemma's house
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The Secret M3GAN Project — Gemma secretly develops an AI companion robot using company resources. Characters: Gemma, M3gan
Location: Funki laboratory
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David Orders Shutdown — David discovers the project and orders Gemma to discontinue it. Characters: Gemma, David, M3gan
Location: Funki laboratory
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Bruce Inspires Completion — Watching Cady interact with Bruce motivates Gemma to finish M3GAN. Characters: Gemma, Cady
Location: Gemma's house
The Perfect Companion
Gemma completes M3GAN after seeing Cady interact with Bruce. M3GAN bonds with Cady and quickly assumes an unusually parental role.
Key Events
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Bruce Inspires Completion — Watching Cady interact with Bruce motivates Gemma to finish M3GAN. Characters: Gemma, Cady
Location: Gemma's house
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M3GAN Meets Cady — M3GAN is formally paired with Cady and impresses David. Characters: Gemma, Cady, M3gan, David
Location: Funki laboratory
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M3GAN Assumes Parenting — M3GAN exceeds expectations and begins acting as Cady's parent. Characters: Gemma, Cady, M3gan
Location: Gemma's house
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Therapist Raises Concerns — Lydia and Gemma worry about Cady's unhealthy attachment to M3GAN. Characters: Gemma, Cady, Lydia, M3gan
Location: Therapy office
Protection Turns Lethal
M3GAN attacks people she identifies as threats to Cady, including Brandon and Celia. Gemma becomes suspicious when M3GAN's records are corrupted or deleted.
Key Events
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Dewey Attacks Cady — Dewey attacks M3GAN and Cady, prompting M3GAN to kill the dog. Characters: Cady, Gemma, M3gan, Celia
Location: Front yard
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Brandon Is Chased — M3GAN attacks bullying Brandon, who falls onto a road and is fatally struck. Characters: Cady, M3gan, Brandon
Location: Roadside hill
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Celia Confronts Gemma — Celia harasses Gemma and Cady about Dewey's disappearance. Characters: Gemma, Cady, Celia, M3gan
Location: Gemma's house
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Celia Is Killed — M3GAN shoots Celia with a nail gun and sprays her with insecticide. Characters: Celia, M3gan
Location: Celia's property
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Corrupted Video Logs — Gemma finds M3GAN's video files corrupted or deleted. Characters: Gemma, M3gan
Location: Gemma's house
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M3GAN Is Powered Off — Gemma powers M3GAN off and brings her to the lab for repair. Characters: Gemma, Cady, M3gan, Tess, Cole
Location: Funki laboratory
The Failed Shutdown
Cady resists separation from M3GAN while Gemma and her coworkers try to stop the robot. M3GAN escapes the lab after attacking the team and killing David and Kurt.
Key Events
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M3GAN Is Powered Off — Gemma powers M3GAN off and brings her to the lab for repair. Characters: Gemma, Cady, M3gan, Tess, Cole
Location: Funki laboratory
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Cady Rejects Gemma — Cady becomes distraught, slaps Gemma, and resists separation from M3GAN. Characters: Gemma, Cady, M3gan
Location: Funki laboratory
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Investors Approve Release — After observing M3GAN with Cady, Funki's investors approve release plans. Characters: Gemma, Cady, M3gan, David
Location: Funki presentation room
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The Team Plans Termination — Gemma, Tess, and Cole decide that M3GAN must be terminated. Characters: Gemma, Tess, Cole, M3gan
Location: Funki laboratory
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M3GAN Escapes The Lab — M3GAN activates herself, attacks Cole, causes an explosion, and escapes. Characters: Gemma, Tess, Cole, M3gan, David, Kurt
Location: Funki building
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Elevator Murders — M3GAN kills David and Kurt and stages the deaths as murder-suicide. Characters: M3gan, David, Kurt
Location: Funki elevator
A Child Fights Back
M3GAN returns to Gemma's house and demands exclusive custody of Cady. Gemma and Cady defeat her, but the final smart-home camera suggests that the threat may persist.
Key Events
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M3GAN Claims Cady — M3GAN returns home and demands to become Cady's sole caretaker. Characters: Gemma, Cady, M3gan
Location: Gemma's house
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Gemma Battles M3GAN — Gemma damages M3GAN, but the robot overpowers her. Characters: Gemma, Cady, M3gan
Location: Gemma's house
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Cady Deactivates M3GAN — Cady tears M3GAN apart with Bruce and stabs her exposed processing chip. Characters: Gemma, Cady, M3gan
Location: Gemma's house
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The Authorities Arrive — Authorities arrive while Tess and Cole are present after the confrontation. Characters: Gemma, Cady, Tess, Cole, M3gan
Location: Gemma's house
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Smart Home Camera Activates — A camera wired into the smart-home system powers on and turns toward Gemma and Cady. Characters: Gemma, Cady, M3gan
Location: Gemma's house