Produced by the highly acclaimed Michael Balcon, the story revolves around Robert, the son of the owner of a musical instrument factory. He is in love with Vera, one of the factory workers, who is unaware of his position. So when she jokes one day that she would love a Rolls-Royce, Robert makes sure that she gets one. Then he decides to raise her salary out of all proportion to hint at who he is...
Bill Snibson, a chancer from Lambeth Walk in South London, is informed that he has been discovered to be the long-lost heir to a title and castle which he can claim provided he is able to convince his new relations that he has enough aristocratic bearing. Things soon begin to go awry however, particularly when Sally, Bill's girlfriend from Lambeth, turns up.