Spy drama about a young dancer from a poor background in Poland who is forced by a baron to spy for him.

The naval officer Maurice de Vergnes, tired of the extravagance of his fiancée Moussia, finds with pleasure a childhood friend: Anna. Jealous, Moussia breaks up with him and Maurice marries Anna. A few years later, Moussia reappears when war is declared. She is now a spy under the orders of Howell... This is a troncated version of a longer film.

In 1721, at the end of his career as a bandit, Cartouche, touched by the grace of an honest young girl, and falling into the hands of justice under the charge of the father of his beloved, asks as a last resort, that the young girl may, before her execution, come and forgive her.