Dorian Healy

Hastings tells Poirot about a new restaurant opening in London which has the same name as one Poirot visited two years ago in Buenos Aires. A yellow iris arrives with the post, which further reminds Poirot of his trip. Iris, one of his dinner companions in Buenos Aires, was murdered and Poirot was unceremoniously deported before he could investigate. Could the mysterious arrival of the flower be a request for Poirot to pick up the case again?

Controversial plans to build a supermarket in Elverton-cum-Latterly lead to murder when a man is stabbed to death and the pollution advisor for the site seems to be spending more time with the women of the village than at work. Can Barnaby and Jones discover the truth and learn what is really polluting Elverton?