Dian is a former street orphan working as a maid for her benefactress, the daughter of Marquis Rowen. To help her lady escape from an unwanted marriage to a man more than twenty years her senior, Dian sends her out the country and assumes her identity, going to the castle of Margrave Evenhart in her stead. The Evenhart family, famous for guarding the North for generations without ever leaving their territory, is a subject of great mystery to the outside world. Will Dian’s identity be discovered? What romantic story will unfold in these days of cohabitation?