Dean is in trouble. He owes money from gambling debts. (Why he doesn't pay off the debts by crooning those songs he's going to sing is a wonder). Jerry is an animal lover apprenticing with a vet. The mob as Dean to fix a horse they don't want to win. Dean is going to use Jerry to do this without telling him. Laughs ensue, there's two girls for the guy and a final race track scene that is up there with the great slapsticks of the Marx Bros, Chaplin etc