Subspecies (1991)

After many years in exile, the evil vampire Radu returns to the fortress of his father, the good King Vladislav, in Prejnar, and kills his father to steal the powerful Blood Stone. Meanwhile, the Americans Michelle and Lillian travel to Transylvania to meet their Romanian friend Mara to research the locals and prepare a study for their PHD about the Romanian culture. They are lodged in an ancient house in Prejnar by the rough local Karl that explains that the residents believe there are good and evil vampires, but they live in peace with the vampires led by King Vladislav for centuries. Soon, Michelle meets the zoology student Stefan and they have a crush on each other. But Radu breaks the truce between the vampires and the humans and he attacks the three women. Stephen rescues the girls and discloses to Michelle that he is Radu's half-brother. Now, Stephen and Karl wants to stop the vampire, but he is powerful and smart, and sneaks in the darkness.