Thirst (1979)

1h 35m · Directed by Rod Hardy

Starring Chantal Contouri, Max Phipps, David Hemmings, Henry Silva, Robert Thompson

The descendant of Elizabeth Bathory is abducted by a cult of self-proclaimed supermen who achieve this state of superiority by drinking from the "blood cows" kept at the "dairy farm", and they try to get her to join them.