The Devil Rides Out plot
"The beauty of woman . . . the demon of darkness . . . the unholy of union"
Nicholas, the Duke of Richleau, welcomes his old friend Rex Van Ryn to visit Simon Aron, the son of a deceased friend. Their unannounced visit, however, is very inconvenient for the young man; he already has a visit from twelve mysterious persons. Nicholas, himself also well versed in black magic, soon discovers that Simon has fallen into the clutches of the satanic cult. This cult is led by the evil Mocata, who possesses impressive powers. It is not long before they are all engaged in a battle between good and evil.