Vicki Carpenter is a high school student at Hamilton high school in 1987. She goes looking for a dress in the prop room in the school because her religious mother already has a dress for her to wear at the prom and finds a trunk that contains Mary lou Maloney's prom accessories from the 1957 Hamilton high school prom. Vicki eventually gets possessed by Mary Lou's spirit because of her opening the trunk which made Mary Lou's spirit get unleashed. Vicki ends up killing people through Mary Lou's powers. But she does end up living through it all because her boyfriend releases her from Mary Lou's trunk and they walk out of the school and find Billy her boyfriend's dad and they end up driving away with Billy possessed by Mary Lou's spirit making no sign of if Vicki and her boyfriend live on and escape from Billy's car and his possessed soul that Mary lou is intended on messing with.