Adult Dai is the youngest of three brothers and has always seemed like the child who needed the least attention from his mother Maki. One spring, his two older brothers move out for work and his father takes a distant assignment, leaving Dai and Maki alone together. The once-lively home suddenly falls silent, and Maki struggles with the emptiness. Seeing her this way fills Dai with loneliness and frustration, and he tries to reclaim the maternal love he was never able to have all to himself...