Goshiki No Satsujin Sha

[Machine Translation] One day, a new female caregiver at Azukiso, a care facility for the elderly, Mei (Maze Mizuki), a.k.a. Mei, discovers the bludgeoned corpse of a patient. Five people saw the apparent murderer fleeing the scene, but they could not testify to the color of the murderer's clothes. However, for some reason, there were five different testimonies about the color of the murderer's clothes: red, green, white, black, and blue! In addition to the impossible testimonies, the investigation is hampered by the mystery of the murder weapon, which cannot be found. Meanwhile, a young man whom May's colleague Hal has a crush on emerges as the most likely suspect. May is moved to tears by Hal, and as an amateur detective with a penchant for mystery, she struggles to prove his innocence... The truth of the impossible crime is vividly revealed with sharp logic! The winner of the 30th Tetsuya Ayukawa Award, unanimously selected by the selection committee members.

高齢者介護施設・あずき荘で働く、新米女性介護士のメイこと明治瑞希(めいじみずき)はある日、利用者の撲殺死体を発見する。逃走する犯人と思しき人物を目撃したのは五人。しかし、犯人の服の色についての証言は「赤」「緑」「白」「黒」「青」と、なぜかバラバラの五通りだった!ありえない証言に加え、見つからない凶器の謎もあり、捜査は難航する。そんな中、メイの同僚・ハルが片思いしている青年が、最有力容疑者として浮上したことが判明。メイはハルに泣きつかれ、ミステリ好きの素人探偵として、彼の無実を証明しようと奮闘するが...。不可能犯罪の真相は、切れ味鋭いロジックで鮮やかに明かされる!選考委員の満場一致で決定した、第30回鮎川哲也賞受賞作。