At an evening of comic impersonations by the American entertainer Carlotta Adams, Poirot is introduced to the famous actress Jane Wilkinson. Quite smitten by her charms, he agrees to visit her estranged husband. Lord Edgware, to urge him to reconsider her request for a divorce. To Poirot's surprise, Edgware insists that he has already agreed to Jane's request, but within 24 hours of Poirot's visit the old man is found murdered. Lord Edgware was not a popular man, but every one of his suspects, from his wife to her ex-lover Bryan, from his bullied daughter to his new butler and his seemingly devoted secretary, Miss Carroll, has a water tight alibi for the night of the murder. Poirot finds his extraordinary powers of detection stretched to the limit. He is forced to confront the unthinkable - could the delectable Jane Wilkinson possibly be guilty of murder, and if so, how?