After suffering through a long and unsuccessful series of fertility treatments, Satoko and her husband Kiyokazu make the decision to adopt a child. Six years after adopting a boy they named Asato, Satoko has quit her job to concentrate fully on her husband and son. The family lives a peaceful existence until the arrival of a stranger.

Sawa Yamagishi worked as a nursing-care helper. The family for an old man asked Sawa to sleep with him, which led her to lose her job. Now, she has nowhere to go. Sawa finds elderly people in trouble and gets involved in their lives. Meeting them, Sawa's own wounds start to heal.