As Hackensack reels from Chucky's relentless—but secret—reign of terror, the Mayor tries to allay fears by cluelessly arresting an innocent suspect. Meanwhile, the kids desperately try to figure out Chucky's mysterious endgame — before it's too late.

Devon worries that Good Chucky can't be trusted; Tiffany spirals from the surprise party.

Armed with new weapons, Chucky aims to become the most prolific serial killer in history.