In early 1800s New Orleans, a ball is being given to honor Gen. Andrew Jackson. Among the attendees is a certain Captain Sazarac, who is actually the notorious buccaneer Jean Lafitte. His real identity is exposed and Gen. Jackson gives him until dawn to leave the city. However, Lafitte soon finds himself drawn into in a plot to rescue Napoleon from the island of St. Helena, hatched by the uncle of the woman he loves.