The Nude Vampire (1970)

IMDB
Genre : Horror
TRAILER
Director : Jean Rollin
Stars : Caroline Cartier, Olivier Rollin, Maurice Lemaître, Bernard Musson
Plot : A young man falls in love with a beautiful woman being chased by sinister masked figures at night. He tries to track her down, and learns she’s being held captive by his father and colleagues who believe she’s a vampire.