Three years ago, Rio married a man she met through work. She continues as a freelance writer while her web-director husband respects her career, and although they have no children, she believes their calm, equal marriage will last. Then a man from her student days suddenly reappears—the man she once worshipped as “Master,” who taught her body depths of pleasure she could never forget. She tries to resist the returning memories and the desire carved into her body, but his hard training begins pulling her back into complete submission.