Small-time jewel thief Leo Martin is deserted by his partners-in-crime, club owner Gus Loman and driver Hatchett, when the robbery they are committing goes wrong. After serving his prison sentence, Leo emerges with an intricate plan for revenge. Leo implicates Loman, as well as his amoral boss, Gregory Lang, for murder -- but Inspector Rogers suspects Leo.
An actor is murdered live on air whilst a play is being broadcast. Everyone in the play and broadcasting house fall under suspicion.
Despite being on his uppers, George is still prepared to pawn his beloved banjo in order to help his girlfriend save her niece from the orphanage. Help seems to be at hand when George is left a fortune by his old auntie, but unfortunately his inheritance is hidden inside a chair which has already been auctioned off! Can George and his chums track down his rightful due before his grasping solicitor (Alastair Sim, in an early film appearance) snatches the lot? It's hard to say, but he still finds time to perform both the title song and the classic 'When I'm Cleaning Windows'.
