Yoshiko (Emiri Okazaki), who lived happily with her husband, had the kindest and most compassionate personality anyone could imagine. One day, she kindly offered help to a young man with a leg disability, but this act of kindness became the beginning of a nightmare. The young man became aroused by her gentleness and gradually began assaulting her. Yoshiko's body slowly grew accustomed to the violence, discovering new sensations she'd never known. Unaware of the changes happening within herself, her mind and body were gradually overtaken by this dark transformation.