Director Shion Sono's loose adaptation of the Japanese manga of the same name, follows two teenagers' attempts to survive the aftermath of Japan's 2011 tsunami. Abandoned by his mother, 14-year-old Sumida (Shôta Sometani) lives in a boathouse beside a lake and dreams of living a normal life free from his father (Ken Mitsuishi)'s casual beatings. Sharing his dreams of normality is his classmate Chazawa (Fumi Nikaidô), who has a crush on Sumida, even though her feelings are not reciprocated. As the pair try to come to terms with their seemingly bleak futures, events come to a head when Sumida's father taunts him to excess, resulting in a fatally violent altercation. With his dreams now dashed, but eager to make amends to society for his actions, Sumida takes to the streets as a self-styled vigilante, dispensing 'justice' with the aid of a kitchen knife.