生田斗真、门胁麦、矶村勇斗主演，炎炎的夏日，整个群马县因连日无雨而陷入严重干旱危机，政府为此推行一系列限水措施。任职于自来水公司的岩切俊作，每天的工作就是挨家挨户拜访拖欠水费的家庭，只要他们不如期缴清水费，就即刻执行停水。某天，遇见了一对小姊妹，她们的父亲下落不明多时，本来相依为命的母亲有希也突然在某次出门后音讯全无。眼见两个孩子因为没有缴费，只能过着无水、无电的艰困生活。究竟带来希望的雨水，能成功降临在这座日益干涸的城市吗？

烈日炎炎的夏日，整個群馬縣因連日無雨而陷入嚴重乾旱危機，政府為此開始推行一系列限水措施。任職於自來水公司的岩切俊作，每天的工作就是挨家挨戶拜訪拖欠水費的家庭。某天，岩切和搭檔木田在執行勤務的過程中，遇見了一對小姊妹，她們的父母下落不明、音訊全無，眼見兩個孩子因為沒有繳費，過著無水、無電的艱困生活，看似對工作早已麻木的岩切，內心開始產生動搖。究竟帶來希望的雨水，能成功降臨在這座日益乾涸的城市嗎？

The story takes place during a summer of continuous sunshine when water supply restrictions are issued in the city. Shunsaku Iwakiri works for the city's water department and his job is to visit homes and stores that are behind on their bills and either collect the money or shut off the water supply (water suspension enforcement). Shunsaku is separated from his wife and children, and his heart grows thirsty as he spends his days visiting poor households and being abhorred. One day, during a water shutoff, Shunsaku meets two young sisters who have been neglected. He sees them as his own children and offers them a helping hand.

日照りが続く夏、水道局員の岩切俊作は水道料金を滞納する家庭に出向いては、水道を停めて回る業務に就いている。県内全域で給水制限が発令されるなか、岩切は蒸発した父親と家に帰らなくなった母親によって2人きりで取り残された幼い姉妹に出会う。困窮する彼女たちにとって、最後のライフラインとなる水を停めなければならないという葛藤に襲われるも、規則に従い岩切は停水を執り行う。