Алюкарда (1977)

Following her parents' death, a young orphan finds refuge in a secluded convent. But her new home hides a terrifying secret. With her enigmatic friend Alucarda, she's drawn into a world of Satan worship and demonic possession. As a sinister influence grows, they both fall into vampirism and darkness, struggling to escape the evil that binds them. The convent, once a place of safety, transforms into a prison threatening to destroy them.