After changing the terms of his will, bequeathing all of his fortune to his long-lost grandnephew, millionaire Frederick Trumble slips a packet of money inside a chair seat.

While pretending to be rich, Parker demonstrates Perry's latest invention, a better mouse trap, and talks Floogle into agreeing to co-invest $25,000 in its development.

Moments later, police detective Sully informs Floogle that Trumble's death, which had been made to look like a suicide, has now been ruled a murder and that he is the prime suspect.

Unaware that Pike, Arnold and Gardner are the swindlers and are spying on him, Floogle demands that Finley, the dealer, make a list of the chairs's buyers.

Unable to enter the crowded café as a customer, Floogle poses as a bass singer, so that he can join the establishment's barbershop quartet.

While singing with the group, which features "has-been" celebrities Don Ameche, Victor Moore and Rudy Vallee, Floogle sees two Trumble chairs in the audience, but in his zeal to get them, he instigates a brawl.

Later, Floogle, whose lost fortune has been exposed, is visited in jail by Pike and finally deduces that the lawyer is the murdering swindler.

Pike then arranges bail for Floogle, and Homer suddenly remembers the last name--Bill Bendix, the vitamin-popping leader of a gang of crooks.

The thugs discuss their plot to murder Bendix by sending an electric shock through wires planted in the Trumble chair, which they are presenting to him as a birthday gift.

Uncredited character actors alphabetically: There is an alternative version of the film where Allen's voice periodically breaks in on the action with wisecracks a la the opening credits.