In this boxing drama, prizefighter Tommy McCoy takes on lightweight champion Johnny Martin. Tommy is also a dancer who works with his boozy father. It is he who suggests the boy try his hand at boxing. When Tommy meets Johnny in the ring, a terrible battle ensues and the champ is killed. The devastated Tommy earns the moniker "Killer." The poor lad soon gets involved with a sleazy gambler and his daughter who falls in love with the distraught fighter. It is she who eventually helps him straighten out and get out of boxing.