The Shiver of the Vampires (1970)(Import)

Le Frisson des Vampires - 1970 (Jean Rollin)
Two newlyweds, Isle and Antoine, are on their honeymoon, on their way to visit Isle's two cousins. When they arrive in the town they discover that her cousins died the day before. Isle and Antoine go to the chateau where they lived anyway. Once there they are greeted by two female Renfields who show them to a room.

Isle goes to the cemetery to visit the graves of her cousins, and a woman named Isabelle tells Isle that she was about to get married to both of her cousins, but in a way she was already their brides. Isle decides to sleep alone on that night because she is upset. While getting ready for bed a woman emerges from the grandfather clock. She introduces herself as Isolde and takes Isle back to the cemetery where she bites Isle in the neck. Antoine, feeling lonely, goes to see Isle, but she isn't in her room. He searches the castle and comes to the chapel where it seems a human sacrifice is taking place. Two of the participants turn out to be Isle's cousins and explain they must kill the woman or she will become like them — vampires. Antoine goes back to find Isle in her room and isn't sure whether it was all a dream.

The next morning at breakfast the Renfields tell Isle and Antoine that her cousins aren't really dead. Antoine goes to the library to meet the cousins but is instead knocked out by books. When he comes to, Antoine goes back to the dining room where he finally meets the cousins. That night Isle decided to sleep alone again, leaving Antoine angry. Isolde returns to Isle and bites her in the neck again. Isabelle tells a friend that Isle's cousins were once vampire slayers and were bitten by vampires. Isabelle later discovers that the cousins are still alive and under Isolde's control and Isolde tells her she is no longer welcome at the castle. She grabs Isabelle and pierces her breasts with her pointed nipple covers. Angry at her for doing this the cousins rape Isolde.

That night the Renfields wake Antoine and take him to the chapel where a ceremony is about to take place that involves Isle, Isolde, the Renfields and the cousins. Antoine breaks open the door to discover they have all disappeared. Not sure whether this was also a dream, he runs to Isle's room to tell her they must escape. She tells him no and that her cousins are the only family she has left, so Antoine decides to sleep on the couch in her room. The next morning Isle cries out that the sunlight hurts her eyes when Antoine opens the curtains. That night is Isle's initiation when she will be given the final kiss and made a vampire. Antoine tries to break it up by taking Isle away. The cousins follow them to a beach. Isolde tries to get into her coffin but finds it on fire. The Renfields put a cross on the tomb door, sealing Isolde inside, so Isolde bites her wrist and dies. Antoine begs Isle to go with him but she stays with her cousins as they await the sunrise.