该剧改编于山口幸三郎的同名系列小说，讲述了听觉、嗅觉、味觉和触觉极弱而视觉格外强大的侦探目暮旅人侦破奇案的故事。 　　“寻物侦探”日暮旅人（松阪桃李 饰）幼年时因被卷入事件，听觉、嗅觉、味觉和触觉都很微弱，唯一残留的视觉则被加强，能够通过眼睛看到人的情感、味道等细节。他和搭档兼经纪人雪路雅彦（滨田岳 饰）、没有血缘关系的女儿灯衣（住田萌乃 饰）一起住在寻物侦探事务所。日暮旅人利用自己的特殊能 力解决了各种各样的案件。事实上，旅人在5岁时被罪犯夺走了父母的性命和自己的四感，他活着只是为了找出犯人并复仇。但是，旅人和围绕在他身边的雪路、灯衣，还有灯衣所读托儿所的老师阳子（多部未华子 饰）之间的羁绊，让原本孤身一人的他感受到了人间温暖，那颗冰冷的内心在家人般的温暖下逐渐融化。

Higurashi Tabito has lost four out of his five senses--his sense of sound, smell, taste, and touch. The only sense he has is sight, which he relies on for his job as a detective who has to investigate and find various missing objects. He works at the detective agency with Yukiji, his buddy and manager, and Tei, his adopted daughter. No matter what it is, Tabito always finds the missing object. His investigative methods, however, are a little bizarre. His eyes seem to be able to see everything, including things that regular people can't see, like scents and emotions.

Without a single blood relative left in the world, the lonely Tabito pours his heart out on his job. Each case he solves brings him closer to Yukiji, Tei, and her daycare teacher Yoko, who all treat him like family. Wrapped in their warmth, his heart begins to melt.

五感のうち聴覚・嗅覚・味覚・触覚の四つを失った日暮旅人（松坂桃李）は、匂いや感情を視ることができる視覚を駆使し、相棒の雪路（濱田岳）と探し物探偵を営む。ヤクザの金庫を破った犯人を探しあてた矢先、娘の灯衣（住田萌乃）と保育士の陽子（多部未華子）が、チンピラ・亀吉（上田竜也）の巻き添えで行方不明と連絡が入る。しかし、特殊な目の能力を使いすぎると、失明の危険が。果たして、旅人は二人を見つけ出せるのか！？