An innocent American engineer is blackmailed by gangsters into a plot to assassinate his cousin, who is a judge in Sicily fighting the Mafia.

Love blossoms between crusader Bradamante—a woman knight wearing an invincible suit of armor—and Moorish prince Ruggero. But a sorceress predicts to Bradamante her beloved will die in battle at the hand of fellow Christian paladin Rolando, whom in turn is in love with Isabella, Ruggero's sister.

Dashing through the streets of Venice, slipping from the clutches of the law, darting across Europe in search of new challenges, Giacomo Casanova races through life with irrepressible energy. Violinist, writer, soldier, spy, gambler, adventurer - it is as a lover that he unbridles the full force of his energy. A charmer and seducer, he, too, is charmed by the beauty of women, seduced by their passion, intrigued by their mystery.