A medical school dropout loses his fiancée in a tragic lawnmower incident, and decides to bring her back. Unfortunately, he was only able to save her head, so he goes to the red light district in the city and lures prostitutes into a hotel room so he can get parts for his girlfriend.
Realising his secret girl-friend Dorothy's pregnancy will sour her relations with her ultra-rich father, career-minded Philadelphia student Jonathan Corliss cooly murders her, making it look like suicide. He then moves to New York to woo her twin sister Ellen. All seems to go well for him, although Ellen's continued investigations into what she is convinced was no suicide forces him to kill again.