Hazel, a cashier in a restaurant, is engaged to Patsy, a bus driver. Patsy earns some extra money by going in on preliminary bouts at the Athletic Club pugilistic exhibitions, and gains a local reputation as a boxer. When a big fighter is suddenly taken ill on the eve of a public contest, Patsy substitutes, wins the match, and suddenly finds himself in line for a bout with the champion of the world. On receipt of an offer for a long tour, he gets a swelled head and repudiates Hazel, who is forced to go back to work in the restaurant. She plans to get even with Patsy.