Mark Damon, Claudia Gravy, Tony Denton, Franco Jamonte. A young man is possessed by Byleth, who is the demon of the incest. The demon appears during the film, but is endowed with a human face. Naturally, the young man starts having lustful desires about his sister. This is an odd, but captivating Italian horror film that will keep your interest right 'til the very end. It is beautifully shot with a real Gothic style. It also doesn't hurt that there are any number of truly beautiful women prancing about during the film. There is, of course quite a bit of nudity and some violence. We've never seen anything quite like this film. It would undoubtedly be rated R. Color, widescreen, from 35mm.