The inoffensive Reverend Babbington chokes to death at a cocktail party he is attending with his wife at the home of famous actor Sir Charles Cartwright. Some time later Sir Bartholomew Strange, an eminent doctor and friend of Cartwright, also dies of poisoning at a dinner party he is giving miles away. There appears to be no link between the two deaths but Poirot, assisted by Cartwright, offers to help Superintendent Crossfield in the investigation and discovers that a mysterious butler with a birthmark on his wrist was hired for the night and appeared to share a joke with the dead doctor. This man has now vanished and would seem to the killer. A third death, that of a sanatorium patient who has written to Poirot, would appear to link to the doctor's murder and there is certainly a secret which somebody will go to any lengths to conceal - but who would gain from the death of a harmless old vicar? 一些让人产生疑惑的地方。为爱杀人。也许有重复，但仍然是经典！。三幕悲剧。三幕悲剧。 人们常说十三个人参加的晚餐会有厄运。你相信吗？当波洛受邀加入查尔斯爵士这次不吉利的晚餐后，诅咒灵验了。牧师巴宾顿先生突然死在了众宾客面前。但死神并未因此停住脚步，凶手亲自在大侦探波洛的眼前拉开了这场谋杀的序幕。杀人的剧作不断地上演，相同的演员，相似的布景，相近的情节。死亡的威胁甚至降临在波洛自己的身上……
