樱桃镇内连续三个少女被杀，死状恐怖。经过调查后发现这些女孩的共同点是她们全是处女。镇内少男少女人人自危，决定举行“失身派对"，务求交出贞操，免招杀身之祸。舞会中的男女几陷疯狂，男的欲念高涨、女的只求失身，而凶手亦趁此机会猎食，目标是仍未愿交出处女身的镇长女儿祖迪……

Francis and Blake Falls are Siamese twins who live in a neat little room in a rundown hotel. While sharing some organs, Blake is always fit and Francis is very sickly. Into their world comes a young lady, who turns their world upside down. She gets involved with Blake, and convinces the two to attend a Halloween party, where they can pass themselves off as wearing a costume. Eventually Francis becomes really ill, and they have to be separated. They then face the physical and mental strains that come from their proposed separation.