Matamura Yori-no, the daughter of a wealthy merchant, unhappily honors her family's decision to marry her off to her father's business partner, thus securing the welfare of her future. But when her father is cheated by one of his workers, stalling Yori's marriage and leaving her family penniless, her mother proposes that they hand the girl over to the lord of their region, a mysterious and reclusive man since the death of his sixth wife. Accepted as the seventh wife of Lord Ashiro, Yori settles down to her life of being married to one of the highest-ranking men in her land, unprepared for the life she has become a part of.

The longer Yori spends with her husband, the more about his twisted past and the dark fate of his previous six wives she unveils. When she reveals that the secret Ashiro has been keeping from her threatens their world, she is caught between loyalty to her lord and determination to stay alive, unwilling to share the same fate as her predecessors...