 When Hamilton High s Prom Queen of 1957, Mary Lou Maloney is killed by her jilted boyfriend, she comes back for revenge 30 years later. Bill Nordham is now the principle of Hamilton High and his son is about to attend the prom with Vicki Carpenter. However, she is possessed by Mary Lou Maloney after opening a trunk in the school s basement. Now Bill must face the horror he left behind in 1957.