Philosopher and amateur sleuth Isabel Dalhousie has an unstinting commitment to her principles. Sticking to her promises has always been one of them. Then Isabel runs into an old classmate facing marital and financial troubles, who reveals a secret that becomes more and more difficult for Isabel to keep.    Thankfully, Isabel’s devoted husband, Jamie, is there to help our heroine navigate her competing moral obligations. Beautifully perceptive and witty, this original short story by Alexander McCall Smith shows Isabel calling upon all of her intelligence, charm, and tact.     A Vintage Shorts "Short Story Month" Original Selection. An ebook short.