When the pressure to be royal becomes too much for Mal, she returns to the Isle of the Lost where her archenemy Uma, Ursula's daughter, has taken her spot as self-proclaimed queen.

Set in the late 1980s, school is out for the summer, and a sun-drenched season of firsts beckons the counselors at Camp Clearwater, a seemingly idyllic Midwestern summer camp, including first loves, first kisses – and first kills. Clearwater’s dark, ancient mythology awakens, and what was supposed to be a summer of fun soon turns into one of unforgettable scares and evil at every turn.