Five years ago, Kana left her long-time job to marry her husband, an up-and-coming novelist, through an arranged marriage. Her husband is the son of a famous and wealthy man, and they lived an elegant life, but her mother-in-law suddenly passed away, and she had to take care of the family he left behind. Kana struggled to fulfill her duties as a daughter-in-law, but by chance she found out about the family's secret. Every time she accepted the troubles of the family, who were suffering without telling anyone, the sadism hidden inside Kana began to stir...