To save his daughter Manon from falling into the hands of a vicious gang of pimps, convict Jacques Costard escapes from jail. Jacques' problems are twofold: he must keep Manon from being abducted into a life of prostitution, and he must also hide his true identity from the girl, who has been raised to believe that Jacques died a hero in WWI.

Prizefighter Mason loses his opening fight so wife Rose leaves him for Hollywood. Without her around Mason trains and starts winning. Rose comes back and wants Mason to dump his manager Regan and replace him with her secret lover Lewis.