An unhappy housewife desperately seeks to free herself from the brutal sexual excesses forced upon her by her husband. She attempts to find solice in an affair with a younger man, but is abused by him as well. In desperation she turns to her sister Giovanna (Joanna), who runs a brothel, specializing in sado-masochistic games. With Giovanna's help, our heroine plots her revenge upon the men who have mistreated her with a display of sexual excess.