Amyas Crale had been famous as a painter...and infamous as a lover. His fiery wife, Caroline, had been jealous as she was devoted. So naturally it was she who was tried and convicted for his murder. Now their daughter, Carla, presents the brilliant Hercules Poirot with the greatest challenge of his career - to clear her mother's name by finding the fatal flaw in what, after sixteen years, appears to be the perfect crime!