The idyll of Blandings Castle is about to be disturbed, for the Honorable Freddie Threepwood is poised to make his debut as a jewel thief. Freddie, however, is not alone: Blandings is simply brimming with criminals and impostors all intent on stealing Aunt Constance's twenty-thousand-pound diamond necklace. It is left to the debonair Psmith, with his usual aplomb, to unscramble the passion, problems, and identities, of one and all.