A young boy, Atsu, grows up along the banks of the Shimanto River in rural southern Shikoku. He comes to grips with the unfairness of life and the emotional pain involved in the loss of innocence. The film is based on an autobiographical novel written by Kyuzo Sasayama.

Hitomi, a former orphan who is trying to leave behind her delinquent ways, one day agrees to tutor a wealthy young boy who has just become an orphan himself…