 Covent Garden wholesale fruit merchant Bob Rusk is an impotent serial killer who strangles women with a necktie. One of his victims is Brenda Blaney, the ex-wife of his best friend, Richard Blaney, who becomes a prime suspect. Fearing discovery, Rusk kills Blaney s girlfriend, a barmaid, and Blaney is arrested. Escaping from jail, Blaney is followed by the police to Rusk s flat, where he s headed to seek revenge for his wrongful conviction of the crimes.