From the most prolific minds in horror comes a fresh new face in terror. M3GAN is a marvel of artificial intelligence, a life-like doll who's programmed to be a child's greatest companion and a parent's greatest ally. Designed by brilliant toy-company roboticist Gemma, M3GAN can listen and watch and learn as she becomes best friend, teacher, playmate, and loyal protector for the child she's bonded to. When Gemma becomes the caretaker of her recently-orphaned eight-year-old niece, Cady, Gemma's unsure and unprepared to be a parent. Now under intense pressure, Gemma decides to pair her prototype with Cady - a decision that will have unimaginable consequences.