In the sleepy small town of Barracuda Bay, Maddy Swift leads the life of a fairly typical teenager, but while attending a party one night, Maddy is struck by lightning and awakens to realize she has been reanimated and turned into a zombie. While becoming acquainted with her new "lifestyle," Maddy stumbles upon two unexpected undead chaperones, fellow students Dane and Chloe, who begin to teach her the ways of zombie life, including defending the populace from Zerkers—the bad zombies. Together, on prom night, the three teens must ultimately defend Barracuda Bay High from an all-out zombie Armageddon.