I Drink Your Blood

I Drink Your Blood also known as HydroPhobia is a cult horror film originally released in 1970. The film was written and directed by David E. Durston, produced by Jerry Gross, and starred Bhaskar Roy Chowdhury and Lynn Lowry.

A Manson Family style cult conducts a bizarre Satanic ritual in the woods at night. A member notices a local girl, Sylvia, furtively watching the event. She had befriended a member, Andy, who invited her to watch. The angered group leader Horace Bones leads an assault on the girl.The next morning, Sylvia emerges from the woods beaten and apparently raped. She is found by Mildred, the woman who runs the local bakery, and Pete, Sylvias younger brother. They return Sylvia home to her grandfather, Doc Banner. Mildred seeks help from her boyfriend, leader of the construction crew working on the nearby dam which has bought up most of the town leaving it deserted. ........

Source: Wikipedia