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.
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.