A timid and dim-witted clergyman is duped into helping a playboy avoid his creditors, inherit his uncle's fortune and get the girl.

With a title like Jack's the Boy, is it any surprise that the star of this breezy quota quickie is British music-hall favorite Jack Hulbert? The star plays the son of a celebrated Scotland Yard detective, who joins the force in hopes of following his father's footsteps. Unfortunately, Jack is something of a screw-up, and before long he has become the laughing stock of the force.

George Pearson, an employee at an underwear factory, is caught between his modern wife and his meddling mother. After buying a special yarn and getting his wife to promote it, he has an argument with his boss, Mr Dawson who insults Pearson's wife and refuses to apologise. Pearson then resigns. After finding out that the yarn is actually worth a fair amount, Mr Dawson tries to buy it from Pearson but he has some competition.

Mother Riley takes over a circus on the point of closing down, and makes it a success.