Taeko and her husband, Jiro, are living a peaceful existence with son, Keita. A tragic accident brings the boy's father, Park, back into her life. Taeko throws herself into helping this deaf and homeless man to cope...

Ruka is a young girl whose parents are separated and whose father works in an aquarium. When two boys, Umi and Sora, who were raised in the sea by dugongs, are brought to the aquarium, Ruka feels drawn to them and begins to realize...