"An exceptionally well-made and entertaining film" – Films and Filming Lost on the way to their honeymoon, a young couple stumbles upon a mysterious family of vampires and their unspeakably evil leader. When a wrong turn leaves newlyweds Marianne and Gerald Harcourt stranded in a remote Bavarian forest, they have no choice but to accept the hospitality of the hypnotic Dr. Ravna, distinguished lord of a nearby castle. Ravna uses his "children" to lure the newlyweds to his lair, and soon they are plunged into a nightmare of horror and deception from which there may be no escape. Their only hope is Professor Zimmer, who calls upon an ancient ritual in a desperate attempt to destroy the vampires and free Marianne from Ravna's power.