Warren Stacy (Gene Davis) is a young office equipment repairman who kills women after they reject his sexual advances. His attempts at flirting are always seen as "creepy" by women, resulting in frequent rejections.[4] His first victim is Betty (June Gilbert), an office worker of his acquaintance. He tracks her down to a wooded area, and observes her having sex with her boyfriend. He ambushes the couple, kills the boyfriend and then gives chase to the naked woman. He catches her and stabs her to death.[4]
Two Los Angeles police detectives, Leo Kessler (Charles Bronson) and Paul McAnn (Andrew Stevens), investigate his murders. Kessler is a seasoned veteran of the force, while McAnn is considerably younger.[4] Stacy avoids prosecution by constructing sound alibis and assaulting his victims while naked except for a pair of latex gloves to hide fingerprints, thus minimizing evidence.
Laurie Kessler (Lisa Eilbacher) is the only daughter of Leo and an acquaintance to some of the victims. A student nurse herself, she becomes a target for the killer.[4] McAnn refuses to go along when Kessler plants evidence in order to frame the suspect. Stacy goes on another rampage, killing three nursing students who are friends with Kessler's daughter.
He is eventually caught, stark naked in the street. Stacy boasts how he will say all the things that will "prove" that he is crazy: he hears voices ordering him to do things, etc., so that one day, he will be back on the street and Kessler, as well as the "whole fucking world," will hear from him again. Kessler replies, "No, we won't." He then shoots Stacy once in the forehead, executing him and leaving all other considerations aside. Kessler stands over the body, surrounded by police.
Directed by J. Lee Thompson
Produced by Pancho Kohner
Lance Hool
Written by William Roberts
J. Lee Thompson
Starring
Charles Bronson
Lisa Eilbacher
Andrew Stevens
Gene Davis
Geoffrey Lewis
Wilford Brimley
Music by Robert O. Ragland
Cinematography Adam Greenberg
Edited by Peter Lee Thompson