 Shy milkman Burleigh Sullivan accidentally knocks out drunken Speed McFarlane, a champion boxer who was flirting with Burleigh s sister. The newspapers get hold of the story and photographers even catch Burleigh knock out Speed again. Speed s crooked manager decides to turn Burleigh into a fighter. Burleigh doesn t realize that all of his opponents have been asked to take a dive. Thinking he really is a great fighter, Burleigh develops a swelled head which puts a crimp in his relationship with pretty nightclub singer Polly Pringle. He may finally get his comeuppance when he challenges Speed for the title.