Danny O'Rourke is the son of a police officer who was killed in the line of duty. Eager to join the police force, Danny fails his exams. The failure causes him to neglect his sweetheart Maggie, whose father is a police lieutenant. His attentions turn instead towards society girl Miriam Welton. When Danny’s sister, Shannon, is arrested for shoplifting, Danny turns to boxing to save her. He works his way towards the championship but discovers the final bought has been rigged. Danny fights anyhow a...