Two years after the bloody rampage of the android M3GAN, her creator Gemma is forced to take a desperate step. She decides to resurrect her infamous creation. Gemma needs the old doll's help to fight Amelia. This new military-grade robot was created by a defense contractor using stolen M3GAN technology. Now, the two deadly artificial intelligences must face off in a ruthless battle. A dangerous new confrontation of high-tech machines begins.