At the end of the 19th century, during a ball in Joinville, on the outskirts of Paris, Georges, a former delinquent working as a carpenter, meets Marie, a young woman connected to a criminal gang.

Passing for crazy and locked up, the CEO of a company escapes from the asylum and claims that he is the captain of a troop of pirates. To the disappointment of the director of the company and in the company of three employees, he accomplishes many extravagances which will be beneficial for his acolytes.