When a disturbed high school student, dressed in a prom suit and wearing a bunny mask, named Trixie Heartlock, kills the family of her ex-boyfriend and classmate named Derek Shaw, who he loves, in a deranged attempt to force them into a return relationship with her, the boy is captured and sent to prison. However, a year later, at his high school prom, Derek is about to come face to face with the killer once again. Will Derek and his friends escape the psychopath?
