A hypnotist uses his powers for revenge against King Louis XV's court.

Orson Wellesas Joseph Balsamo aka Count Cagliostro
Nancy Guildas Marie Antoinette / Lorenza
Akim Tamiroffas Gitano
Frank Latimoreas Gilbert de Rezel
Valentina Corteseas Zoraida
Margot Grahameas Mme. du Barry
Stephen Bekassyas Viscount de Montagne
Berry Kroegeras Alexandre Dumas, Sr.
Gregory Gayeas Chambord / Monk (as Gregory Gay)
Raymond Burras Alexandre Dumas, Jr.
Otello Martelli