This drama tells the story of the Oushu Fujiwara clan spanning generations, 140 years in the late Heian era. They established their domain in Touhoku area (North-east area of Japan), independent from the rule of Minamoto clan.

Hiroko attends the memorial service of her fiancé, Itsuki Fujii, who died in a mountain-climbing incident. Although Itsuki's mother says that their old house is gone, Hiroko records the address listed under his name in his yearbook and sends him a letter. Surprisingly, she receives a reply, and discovers it came from his old classmate, a girl who also happens to be called Itsuki Fujii.