Gemma, a brilliant roboticist at a toy company, uses artificial intelligence to develop M3GAN (short for Model 3 Generative Android), a lifelike doll programmed to be a child’s greatest companion and a parent’s greatest ally. After unexpectedly gaining custody of her recently orphaned niece, Cady, when the child’s parents died in a car accident, Gemma enlists the help of the M3GAN prototype, a decision that has horrific consequences when the doll becomes self-aware and overprotective of Cady, leading her to kill everyone in her way.
