A robotics engineer at a toy company builds a life-like doll that begins to take on a life of its own.
Two years after M3GAN's rampage, her creator, Gemma, resorts to resurrecting her infamous creation in order to take down Amelia, the military-grade weapon who was built by a defense contractor who stole M3GAN's underlying tech.
Family navigates turbulent 1960s dynamics. Mom separates from alcoholic husband. Daughters grapple with changes. Dad's antique gift hides dark force that imperils all.