After losing her husband, Shiori lived a quiet life with her son. Working as a nurse to support her family, she one day faced intense anger from a doctor, which ultimately led to her submitting to him physically. The doctor repeatedly cornered Shiori in hidden areas of the hospital, gradually taking control of her mind. Shiori lost the ability to act on her own will and began craving pleasure. Soon, she became involved with her son's friend, beginning a life consumed by lust and desire.