Summer, 2021, Fukushima. Seventeen-year-old Akira experienced the nuclear power plant accident ten years earlier. His mother died from radiation exposure, and his father, who had been a nuclear plant worker, is tormented by guilt and goes to work as a decontamination laborer, leaving the family scattered. Akira’s friend Shinichi worries about him as Akira, having lost his anchor, wanders aimlessly and stops coming to school. Shinichi himself, however, carries a loneliness he cannot share with others. One day, Akira meets the Koike couple, who run a surf shop, and Yuji, an employee there. Gradually, Akira begins to open the heart he had kept closed. Reassured by seeing a changed Akira, Shinichi also starts visiting the surf shop. Yet wounds that will not heal quietly begin to eat away at them.