Synopsis: The story follows Gemma (Allison Williams), a brilliant roboticist at a toy company who uses artificial intelligence to develop the Model 3 Generative Android (M3GAN), a life-like doll programmed to be a child's greatest companion and a parent's greatest ally. After unexpectedly gaining custody of her orphaned niece Katie, Gemma enlists the help of the M3GAN prototype – a decision that has unimaginable consequences.