Cult filmmaker Jesus Franco directed this erotic horror film using the pseudonym "Frank Hollmann." The plot concerns Dr. Johnson (Fred Williams), who is driven to suicide after being exiled from the medical profession for his unorthodox experiments involving human embryos. Blaming the medical board, Johnson's distraught, psychotic widow (Soledad Miranda) hunts down the doctors one by one, murdering them by methods both sadistic and sexual. Paul Muller, Ewa Stroemberg, and Howard Vernon co-star, while Franco appears as Dr. Donan, who meets a gruesome torture death at the end of the film. A distinctive visual style, replete with surrealistic photography by Manuel Merino, sets this film apart from scores of similar sex-horror entries flooding the market in the early 1970s.