Algernon Sprigg, a horse-racing fanatic, is convinced that everyone is a gambler at heart. To prove his theory, he bets a friend that he can convert Amos Purdie, the puritanical head of an anti-betting association, into a punter within a week.
A young composer goes blind, and shortly afterward enters his most recent work in a competition. He believes he's won, but doesn't know that his wife couldn't bear to tell him that he didn't. Complications ensue.