Captain Arthur Hastings, invalided in the Great War, is recuperating as a guest of John Cavendish at Styles Court, the "country-place" of John's autocratic old aunt, Emily Inglethorpe - she of a sizeable fortune, and so recently remarried to a man 20 years her junior. When Emily's sudden heart attack is found to be attributable to strychnine, Hastings recruits an old friend, now retired, to aid in the local investigation. With impeccable timing, Hercule Poirot, the famous Belgian detective, makes his dramatic entrance into the pages of crime literature.

旧友の招きでスタイルズ荘を訪れたヘイスティングズは到着早々事件に巻き込まれた。

In Poirot Investigates, Agatha Christie presents eleven riveting short stories featuring the famous Belgian detective, Hercule Poirot. From high-stakes jewel thefts to baffling murders, Poirot faces a variety of complex and puzzling cases that challenge his remarkable intellect and investigative prowess. In these tales, Poirot must unravel a web of deception involving missing persons, secret identities, and shocking crimes, using his keen observation and logical deductions to reveal the truth.

大富豪ゴードン・クロードが戦時中に死し、莫大な財産は若き未亡人が相続した。戦後、クロード家の人々はまとまった金の必要に迫られながら、後ろ盾のゴードンを失くし窮地に立たされる。"あの未亡人さえいなければ" 一族の思いが憎しみへと変わった時……戦争が生んだ心の闇をポアロが暴く。

嫌われ者の老退役大佐が殺された。しかも現場が村の牧師館の書斎だったから、ふだんは静かなセント・メアリ・ミード村は大騒ぎ。