今野秋一（绫野刚 饰演）因为被公司调职，从大城市的东京来到岩手县盛冈市居住，人生地不熟的他，虽能与同事正常相处却总无法融入。直到他结识了同龄的日浅典博（松田龙平 饰演），才逐渐对这未知的土地卸下了心房。外表吊儿啷当的日浅，不仅留着一头凌乱的中长发，还常不听今野的劝导在公司偷抽烟。两人乍看个性不合，却在一夜把酒言欢，建立起深厚的友谊，结伴溯溪钓鱼甚或夜游。因为一些微不足道的小事而欢笑的日子，彷佛像是已然成熟却迟来的青春岁月，让今野内心也泛起了阵阵涟漪。某天，日浅突然下落不明，随着今野开始找寻他的踪迹，挚友底下截然不同的面貌才逐渐浮出水面：公司女同事表示曾借钱给日浅却无从追讨、断绝父子关系而不愿向警方提出协寻申请的冷淡家庭……究竟那个曾经一起度过许多美好时光的男人，是否为日浅真正的模样？行踪不明的他，现在又身处何方？Konno moved to Iwate for his job. There, he meets his colleague Hiasa at work. They form a close bond while drinking together, fishing together and doing other activities. One day, Hiasa quits his job without saying anything to Konno. Shortly after, they meet again, but they cannot have that close feeling as they had before. They do not meet again. Time passes and Konno learns that Hiasa went missing. While looking for Hiasa, Konno learns a secret about Hiasa.
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