Kanako, who wants to be a plant, has met Koh in a botanical garden. Gradually Koh started growing his root... their curious friendship becomes something more than the human relationship which is based on language.

Eiko has repeated flashbacks from childhood. In that place where she is enveloped by a huge noise, a boy starts running and Eiko falls off a swing. Are they memories or dreams, or are they the present day, or do they belong to someone else? The sound expands. That’s really something huge.