Chiaki Yoshino is a TV producer. She is 45-years-old and single. Chiaki Yoshino worries about her health and her later years rather than dating. She hopes to buy an old house and live there with a friend when she gets older.

Chiaki then goes to Kamakura, Japan to look for a house. There, she meets a 50-year-old single man Wahei Nagakura. Wahei's first wife died and he has one child. Their love story begins ...

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.