Kino lives on a farm on the side of a mountain in Japan. His friend, Jiya, lives in a fishing village below. Everyone, including Kino and Jiya, has heard of the big wave. No one suspects it will wash over them, until the rushing water sweeps away the whole village--including Jiya's family.

As Jiya struggles to overcome his sorrow, with the help of Kino and his father, he comes to understand that it is only in the presence of danger that one learns to be brave, and that even in the face of terrible tragedy, life and love are stronger than death.