The scene is Victorian London, where wealthy widow Hepburn is being sued for breach of promise by her much-younger ex-fiance. Olivier is the highly respected barrister engaged to defend Hepburn in court. The usually reserved Olivier relishes the opportunity to see Hepburn, who 40 years earlier had been his lover. He is driven to hilarious distraction by Hepburn's adamant insistence that she has never seen him before in her life.