The plot revolves around Glen (or Chucky), the killer doll possessed by the spirit of serial killer Charles Lee Ray (also known as Chucky), and his girlfriend Tiffany, a female doll possessed by the spirit of a woman named Elsa Lanchester. The two are planning to have a child. However, their plan backfires when their human son, Damien (or Glen), turns out to be half-human and half-doll. The film involves various bloody and comedic events as Chucky and Tiffany try to protect their son while navigating through a series of horror and comedy elements.