In exchange for immortality, an ancient sect of satanic monks agrees to honor their dark lord with a blood sacrifice every 13 years. But in the modern era, finding bodies for the altar is not so easy. Setting up shop in New York City, the devil worshippers search for their next ceremonial victim. William Beckwith stars as the leader of the cult, and Mavis Harris is the nun who’s on to his diabolical deeds.
Roberta Findlay along with her husband Michael Findlay directed and produced numerous sexploitation movies. They have been described as “the most notorious filmmakers in the annals of sexploitation”.
Roberta later went on to direct hardcore pornographic films including Anyone But My Husband (1975), Angel on Fire (1974), A Woman’s Torment (1977), and Mystique (1979). She left the adult film industry after the controversial Shauna: Every Man’s Fantasy (1985), about the tragic suicide of porn star Shauna Grant. Since then she’s made mostly horror and action films such as Tenement, The Oracle (both 1985), Blood Sisters (1987) and Prime Evil (1988). —wikipedia