This book reads from right to left in Manga style. In a world virtually destroyed by environmental pollution, life is sparse and grim, with only a few civilized societies remaining in small pockets along the coast. Stories of vicious sub-humans keep the inhabitants of tiny oases nervous and apprehensive. They do not welcome an outsider, like Marine, a young girl who washes up on the shore. Remembering nothing of her past, she is found and befriended by Kazuya, a young boy who loves the sea. Marine is imprisoned by people who believe her to be a sub-human creature and it is up to Kazuya to help her escape and uncover the mystery of her past.