In this follow-up to his ground-breaking horror film The Awful Dr. Orlof, Jess Franco (Female Vampire, A Virgin Among the Living Dead) continued to lay the foundation of a career defined by fetishistic imagery and transgressive violence. A series of grisly murders in the remote village of Holfen convinces the locals that the town is still cursed by the spirit of a 17th-century baron who maintained an elaborate torture chamber in the dungeon of his estate. Undaunted by the villagers' superstitions, a detective (Georges Rollin) quickly focuses his investigation upon the creepy Max Von Klaus (Howard Vernon). Meanwhile, the youngest male descendent of the Von Klaus bloodline (Hugo Blanco) returns home to mourn the death of his mother, and must wrestle with his own connection to the cursed family history.