In 1789 France, a thief known as La Tulipe Noir, regaled in black, including a black mask and cape, is going through France robbing noblemen. This sounds like Zorro or Robin Hood, except that the sentence ends "stealing from noblemen." Nothing about helping the poor. La Tulipe Noir, in reality Count Guillaume de Saint Preux (Alain Delon) is interested only in getting money and enjoying his clandestine affair with Marquise Catherine de Vigogne, who is a married to Marquis de Vigogne (Akim Tamiroff).
The French somehow believe in La Tulipe as a revolutionary hero. But no one knows who he is. The Chief of Police Baron La Mouche (Adolfo Marsillach) believes Guillaume is La Tulipe and runs a sword down the man's cheek during an event, figuring when he's making his robbery rounds, he'll be easy to recognize.
Now unable to rob anyone, Guillaume sends for his younger lookalike brother, Julien (Alain Delon) to lure La Mouche. Julien is guileless and idealistic, not to mention romantic, so when he meets Caroline Plantin, (Verna Lisi) a revolutionary, he falls for her.
Julien soon learns that Guillaume is not interested in being a revolutionary so he takes on his La Tulipe persona to support the revolutionaries.
This story is loosely based on a Dumas novel - real loosely, from what I understand. I found it delightful and very tongue-in-cheek. It's not as good as the Mark of Zorro of Tyrone Power, which had humor but also exciting drama, but it was still fun. Delon himself would play Zorro about ten years after this.
Delon plays both brothers beautifully, Guillaume more macho and tough, Julien sweet and innocent. His acting can be controversial because of his staggering, almost impossible good looks and a charisma that wipes everybody else off the screen. And let's face it, it's usually men who find fault with him. If you've seen "Two Men in Town," "Mr. Klein," "Notre Histoire," and many others, he's an excellent actor, the winner of two Cesars, the French equivalent of the Oscars.
Akim Tamiroff and Adolfo Marsillach are fantastic in their roles, bringing a good deal of humor to them.
This was a non-dubbed version with subtitles - you will certainly be let down if you see it dubbed. Very good film.