Yukio, a farm boy, and Toru, a fisherboy, live in a small Japanese village that is periodically threatened by a volcano on one side and tidal waves on the other. Yukio's younger sister Setsu follows then and dreams of becoming a pearl diver. Toru is preparing to go fishing with his father when a bell tolls and a danger flag is hung high on the hill behind the village ... Read... imdb.com