It is the Taisho Period in Japan. Tanjiro, a kindhearted boy who sells charcoal for a living, finds his family slaughtered by a demon. To make matters worse, his younger sister Nezuko, the sole survivor, has been transformed into a demon herself. Though devastated by this grim reality, Tanjiro resolves to become a "demon slayer" so that he can turn his sister back into a human, and kill the demon that massacred his family.
After meeting one day, a shy boy who expresses himself through haiku and a bubbly but self-conscious girl share a brief, magical summer.
One fateful summer, a group of elementary school kids set adrift on an abandoned apartment building must look within themselves to find a way back home.
