Five years ago, Kana left her long-time job to marry her husband, a rising and acclaimed novelist. He was the son of a renowned wealthy family, and they lived a luxurious, elegant life every day—until her mother-in-law suddenly passed away from illness, leaving Kana responsible for taking care of the household. As she struggled to fulfill her duties as a dutiful daughter-in-law, she accidentally uncovered the family's dark, hidden secrets. With each tormenting family secret she was forced to keep buried inside, unable to speak of it to anyone, the sadism that had lain dormant within Kana's body began to awaken...