What appears to be a cut-and-dried case of murder of an aging one time showgirl on Hampstead Heath by her lover is complicated by several factors, including a far more respectable paramour, and her insistence that a great inheritance was due her that nobody can verify.

Lord Loam has modern ideas about his household, he believes in treating his servants as his equals - at least sometimes. His butler, Crichton, still believes that members of the serving class should know their place and be happy there. But when the Loam family are shipwrecked on a desert island with the self-reliant Crichton and lady's maid Tweeny, the class system is put to the test.

On the eve of World War II, zany heiress Amanda Kelly travels by train to Switzerland. While passing through Germany, she meets a sweet elderly lady, who suddenly vanishes. Distraught, she questions her fellow passengers who claim that the woman was never there. Unsure if it's all in her mind or if there's a more sinister plot afoot, Amanda teams up with photographer Robert Condon to discover the truth.