Assistant Inspector Sugiyama Shintaro is a compassionate detective who works for Kichijoji Police Precinct. The cases he has solved are too many to count. Once he comes back home, he is a father to the three children, Miharu, Kaito (Suda Eito) and Gaku (Matsuura Rihito), he has with his beloved wife Kaori. However, he cannot deny that he has sacrificed his family because he has been busy at work. At that very moment, Kaori is fighting against an illness in hospital and his mother-in-law (Takahashi Keiko) is not pleased with him. Sugiyama has focused on the family ever since his wife fell sick. He has even considered a move away from the frontline and Kichijoji Police Precinct’s arrest rate has consequently declined. Then, a murder occurs within the precinct’s jurisdiction. Sugiyama strives to juggle child raising, housework and the investigation. However, he can hardly do so as he ends up late for a meeting because he has to send his children to nursery school. Unable to just watch without doing anything, his mother-in-law declares that she will take custody of the children. Sugiyama makes the decision to quit being a detective, but...

　　效力于警视厅吉祥寺警署的杉山真太郎（谷原章介 饰）是一名业务精湛的资深刑警，他曾经参与许多重大案件的侦破，但是其在事业最辉煌的关头却渐渐走向平庸。原来如此干练的杉山还是有着三个儿女的好爸爸，妻子香织（酒井美纪 饰）患病在床，他不得不抽出更多的时间照顾家人。人生的重心逐渐移向家庭的同时，杉山也筹划着调入不用经常赶往现场的有闲部门。与此同时，吉祥寺警署的逮捕率不断下降，新任署长镰本义夫（榎木孝明 饰）强势入主，他致力于改变警署当前的现状，从总厅调来的苫米地（袴田吉彦 饰）正是他的得力助手。

　　想要辞职而不能的杉山被迫周旋在刑警和父亲的双重身份中，朝着未知的未来全速奔走……

Shintaro est détective au poste de police de Kichijoji à Tokyo, Japon. Il travaille avec Yu Nagamine . Dans sa vie personnelle, Shintaro est marié à Kaori et a trois enfants. Sa femme est actuellement hospitalisée. Dans le passé, le travail de détective de Shintaro était exemplaire, mais après que sa femme soit tombée malade, il s'est concentré sur les soins de sa famille. Le nombre d'arrestations à son poste de police a chuté à cause de ça. Shintaro fait de son mieux pour équilibrer son travail et prendre soin de sa famille, mais c'est difficile. La mère de Karoi, Yoshie propose alors de s'occuper des enfants.

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