Count Dracula’s pregnant granddaughter arrives at his castle, along with her husband, who is not a vampire. While she prepares to give birth to a new member of the Dracula line, her husband secretly launches into a series of affairs with the Count’s resident “brides.”

The legendary Loreley has been living for centuries in a grotto beneath the river Rhein in Germany. Every night when the moon is full, she turns into a reptile-like creature craving for human blood. When one girl after another of a nearby boarding school is killed by her, a hunter named Sirgurd is engaged to kill the monster.