Thirty-six years after the events of the first film, the Deetz family returns home to Winter River following Charles Deetz's unexpected death. Lydia's life is turned upside down when her rebellious teenage daughter, Astrid, discovers the mysterious model of the town in the attic and the portal to the Afterlife is accidentally opened, releasing Betelgeuse.

When tech billionaire Slater King meets cocktail waitress Frida at his fundraising gala, he invites her to join him and his friends on a dream vacation on his private island. As strange things start to happen, Frida questions her reality.