黄色蝴蝶花舞动，春风送暖醉心房。尤蜜荟吧

　　Exactly two years ago, in Buenos Aires, circumstances prevented Poirot from investigating the sudden death of the beautiful Iris Russell. Now he has the chance to try again, this time in London, when a yellow iris, mysteriously left on his doorstep, alerts Poirot that the killer may strike once more.