A broken-down alcoholic prizefighter struggles to keep custody of his adoring son.

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.

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

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.

Young Irish boxer James Carabine arrives in New York from Ireland, his way having been paid by Peggy Nolan, a girl from his hometown who's sweet on him. Unfortunately, James falls for the trampy Marcolina, who hooks up with him when her boxer husband loses a fight due to the shady doings of friends of fighter Blanco Johnson. Peggy sets out to rescue him from the bad crowd he's hanging with and get him back into prime boxing form.