Vampire in Venice

Professor Paris Catalano goes to Venice to investigate the last known appearance of Nosferatu during the Carnival of 1786. Catalano seems to think that the vampire is searching for a means to put an end to his torment and actually be dead. He stays with a family who, legend says, has the vampire trapped in a tomb in the basement. After a séance, "the vampire" appears and then it becomes a question of how do you put the evil back into the box.