After fighting off zombified versions of Shane, Leonard and Andrew in a nightmarish version of Hamilton High with a makeshift flamethrower, Sarah tracks Alex down to Hell's equivalent of Hamilton High's gym. There, she sees Mary Lou about to kill Alex so he can be her prom king for all eternity.
After battling undead versions of Shane, Leonard, and Andrew in a nightmarish version of Hamilton High School, Sarah tracks Alex to Hell's equivalent of the school gym, where she sees Mary Lou about to kill him so he can be her prom king forever.