Both Jack Sander and Bob Corby are boxers in love with Mabel. Jack and Mabel wed, but their marriage is flat. The young wife looks to Bob for comfort.

18-year-old Rosie Kaplan O'Grady was found as an abandoned baby by O'Grady, an Irish policeman, and Kaplan, a Jewish pawnbroker, and raised by them as their own. She is being courted by two men; prizefighter Terry Callahan and a rich socialite, Tommy Sinclair and has to choose between them.

A ruthless outlaw becomes very protective of a prizefighter when he learns the young man is his own son.