Speed McFarland, world's middleweight champion, is knocked out in a street argument by a truck driver. The truck driver turns out to be a mild, inoffensive milk-man and the knockout, a mistake of the newspaper reporters. The champion's manager conceives the idea of making a fighter of the milk-man, and through a series of fixed fights, build him up as a contender for the champion and a financial asset. A love affair has sprung up between the champion and the milk-man's sister which is broken when she learns that the champion is to fight her brother. She persuades him to call off the fight, but the milk-man, inflated with his own importance, so riles the champion that he loses his head and at the cost of losing his sweetheart goes through with the fight. The milk-,man wins the fight by a comedy fluke, becoming world's middleweight champion. All have bet their savings on the real champion and things look very dark, when the milk-man confesses to having drawn the money from his sister's account, and bet it on himself. This seems like a fortune and things are bright again, when we learn that the milk-man has invested the winning in Saint Bernard dogs and a dairy. All are in darkest despair, when the manager sees a way to turn the seeming mistake into a bright future.