Shuji and Yuri work at a signboard shop. Shuji carries Yuri on his back wherever he goes. That is how they have lived together. One morning, however, Yuri suddenly disappears. And the truth that comes to light.

The not-too-distant future. Humanity is dying out. One day, a man who collects junk meets a boy from the sea. In a world where no one can live without protective clothing, the boy is naked. The film depicts an encounter between the old humans and the new.