Hajime grows up in post-war Japan, and to him it seems like everyone has sisters and brothers, everyone but him. His only friend is Shimamoto, who also is an only child. The pair enjoy listening to music, among other things. But when his family moves out of the city, they lose contact with one another.

When in his thirties, Hajime has found happiness in his wife and their daughters, and in the jazz bar, which he runs. He is content. Then Shimamoto re-enters his life. She is beautiful, seductive, and mysterious.

Hajime is thrown back in time and risks everything, he now has. He is forced to choose between holding on to his wife and children or try to reclaim the past that excites him so much.