This loose adaptation of the Victor Hugo classic shifts the story to Italy and back in time, with the deformed protagonist meeting Lucrezia Borgia instead of Queen Anne. Also, Gwynplaine is renamed Angelo (Jean Sorel) with his disfigurement represented by a single broad slash across his mouth, crude yet convincing. The story (not credited to Hugo) is a swashbuckler pitting the disfigured acrobat against the henchmen of the Borgias.

Twin brothers were raised by wolves, revolt against tyranny in pre-Roman Italy and then come to a parting of the ways as they lead their people toward the founding of a new city, the founders of Rome.