One dark and stormy Halloween night in the 1980s, tweenagers Plunger, Dickey, Chip, and their new friend Ceecee begin a tabletop RPG of eldritch horror, their shipwrecked characters investigating a mysterious island lighthouse. But just as they’re finishing up their game, the kids are suddenly confronted with real-life horror and must find a way to channel the courage of their characters or risk a true Total Party Kill.