When rich, bored Ursula Deane takes an interest in a penniless violinist, she lets herself in for more than she had expected. And when her brother, Lord Chitterne, meets the violinist's sister, Sara, things really begin to get complicated! This sparkling comedy of London in the hectic '20s shows what happens when the a daughter of a pig-keeping peer learns a hard lesson from the daughter of a mean-minded, puritanical grocer—a lesson which leads to the wearing of the expensive halo of the title.