A body found in the mountains of Tohoku, where Muroi has moved, is linked to the Rainbow Bridge incident. Muroi is asked to return to work, and he ponders whether he can keep his promise to his former colleagues. As the investigation progresses, each of the children Muroi has taken in grows up.
Toshiro Yanagiba
Shinji Muroi
Riko Fukumoto
Jun Saito
Kouhei Matsushita
Yuma Yamoto
Akari Nibu
Miki Maya
Toshio Kakehi
