Marco, a traveling soldier in Renaissance Italy, enters the employ of an ambitious lord named Astolfo whose cruel reign is being challenged by a rebel known as "the Red Mask." Marco soon becomes romantically involved with both Karima, a Gypsy woman, and Iolanda, Astolfo`s niece who blames her uncle for her father`s death. Intrigues at the court soon result in Marco`s fall from favor. He`s about to be executed when a rebellion erupts in which the Red Mask`s true identity is dramatically revealed.