The film deals with the sex life of a young New York woman, Kitty (Henrietta Holm), and her boyfriend Stud (Sylvester Stallone). Stud is brutal and oafish but Kitty is enamoured with his sexual performances. They sometimes engage into light sadomasochism, with Stud belt-whipping Kitty. Stud later posts a sign on a bulletin board inviting people to a party. Several people show up at Kitty and Stud's apartment and they all engage into group sex, with Stud servicing all the women.