本剧由ITV翻拍自Andrea Newman70年代的心理剧情三集迷你剧。讲述了父亲对女儿的溺爱，以及家庭中深藏的秘密。

James Bentley is tried for the murder of Abigail McGinty, the charwoman of Broadhinny who also took in Bentley as her lodger. The evidence is overwhelming, and soon after he is sentenced to hang. Superintendent Spence is not convinced of the man's guilt, and so he visits Poirot, asking him to look into the case. Poirot then heads off to the village, where he becomes the paying guest of Maureen and Major Johnnie Summerhayes. Ariadne Oliver, Poirot's novelist friend, has also come to Broadhinny to collaborate on a stage adaptation of one of her novels with dramatist Robin Upward. With the clue of a bottle of ink purchased by the dead woman shortly before her death, Poirot searches Mrs. McGinty's belongings and finds an edition of The Sunday Comet newspaper, where an article concerning two women connected with famous murders has been cut out. With the story are two photographs of the women. Poirot discovers that Mrs. McGinty had seen one of the photographs before, and knew to whom it belonged to. But which woman was this case connected with? Are any of the people living in Broadhinny related to these women, as one of their children? Or perhaps one of them is one of the actual women? The puzzle pieces begin to fit in, especially after Poirot is shoved into the path of an oncoming train by an unknown entity. But will the murderer strike again?

本片以克里斯蒂创造的著名比利时侦探波洛为主角，讲述了一个发生在风景迷人的摩洛哥的破案故事。波艾顿爵士是位考古学家，他携儿子在沙漠中即将有重大发现。波洛也在当地度假。波艾顿爵士第二任妻子被谋杀，财富蒸发。嫌疑犯很多，包括她的家人。只有波洛能发现谁安排了波艾顿太太的死亡之约。

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……

故事发生在上世纪五十年代的巴黎，四名女性在蒙马特的街道上被人谋杀，案情看似毫无关联，但探长麦格雷却怀疑这四起案件为同一名连环杀手所为。麦格雷面临破案的巨大压力，于是他利用罪犯的虚荣心精心设计了一个抓捕计划。随着调查的深入，麦格雷将嫌疑人名单缩小到三人范围。最终的结果令人震惊。