故事讲述前刑警岛田修悟（江口洋介）请了小岛亚花里（上白石萌歌）担任助手，开了一间侦探事务所。但完全没有工作的干劲。某一天，一名有钱的老妇前来委托，委托内容为希望帮助在医院认识的大松干枝（梶芽衣子）完成人生最后的心愿、带她去某个地方。老妇佐藤和子（倍赏美津子）表示不论花多少钱都可以，甚至派遣一名热血护理师寺本春纪（志尊淳）。还表示今后会持续这样的活动。岛田过去因为工作的关系而失去儿子、跟妻子时恵（板谷由夏）分开，并辞去刑警。虽然对于老妇为何选上自己感到疑惑但仍接下此工作，而开始接触患者的人生。而此活动当中也隐含着和子本身「人生最后的愿望」。

由主角與助手組成的偵探事務所，在一次有錢老婦人委託幫助住院時的病友實現最後的願望，之後在老婦人持續贊助下，一位熱血護士加入後３人團隊開始了執行臨終願望的實現活動，故事描述的是出身和成長都不同的４人面對委託人的“臨終願望”之餘，成員也注視著各自內心的傷痛，共同邁向新的未來。

One day, unmotivated private detective Shimada receives a request from an old woman. She asks him to make the last wish of her acquaintance come true, promising that she spends any amount of money on it. Shimada questions why the client chose him for this task but working on it gradually enables him to deal with his tough memory. Later it turns out that the old woman's last wish is also hidden behind the request.

출신도 자란 환경도 전혀 다른 4명이 우연한 계기로 탐정팀이 되면서 의뢰인의 마지막 소원을 해결하는 이야기