A masked killer stalks an institution for mentally disturbed rich women.

Upon his return from battle in the previous film, the great warrior Hercules learns that his lover, Daianara, has lost her senses. Acording of the oracle Medea, Dianara’s only hope is the Stone of Forgetfulness which lies deep in the realm of Hades. Hercules, with two companions, Theseus and Telemachus, embarks on a dangerous quest for the stone, while he is unaware that Dianara’s guardian, King Lico, is the one responsible for her condition and plots to have the girl for himself as his bride upon her revival.

Delves into the career of the notorious Italian filmmaker, Aristide Massaccesi aka Joe D’Amato, the infamous director behind the legendary Video Nasties Anthropophagus: The Beast and Absurd.

The 1800s: scholarly Karl Schiller believes he’s found the ring of the Nibelungen, which holds great power. It’s at Castle Dracula. His twin, Franz, a gambler, asks if vampires frighten Karl; Karl shows him an Egyptian amulet, which may protect him. Franz takes the amulet and sets out ahead of his brother, arriving at the castle first. There he finds a countess who invites him to dine. Later that night, Karl arrives. Coincidently, it’s the Night of the Virgin Moon, a night that falls every fifty years and draws five virgins from the surrounding village to the castle not be heard from again. Can Karl protect his brother, find the ring, and rescue any of the women?