Sins of Desire on AllMovie

The depraved shenanigans at a sex clinic provide the plot of this erotic crime thriller from B-movie director Jim Wynorski. There is something sinister going at the Callister Sex Institute, a surrogate and sexual healing clinic run by therapist Scott Callister (Jay Richardson) and his bisexual wife Dr. Jessica Callister (Delia Sheppard). While investigating allegations of malfeasance, an undercover operative, Monica Waldman (Gail Harris) has been raped and murdered. Her boss, private eye Barry Mitchum (Nick Cassavetes) is determined to nail the Callisters, and so is Kay Egan (Tanya Roberts), whose sister committed suicide after being sexually assaulted at the clinic. After Barry and Kay discover they're after the same goal, they join forces to expose the Callisters, with Kay even going so far as to use her body in an effort to help Barry.