 After attending esoterical studies with a wise man, Cagliostro, a mysterious Italian count, received the gift of supernatural powers. He started to travel all over Europe to heal the poor. But he is also a member of a pre-revolutionary lodge the aim of which is to give freedom to the populations of Europe. This cannot be tolerated by the 18th century s establishment and bought the Pope and the regal house of France try to eliminate him. So Cagliostro is locked up in a castle, while his wife is killed. But when in 1795 the door of his cell is opened there is nothing inside but a sword...