Io is unsatisfied with her married life and becomes involved in an affair with her boss at work. She is captivated by his passionate feelings, drawn deeper and deeper by a desire that one encounter cannot satisfy. Enthralled by her boss's insatiable stamina, she repeatedly craves him over and over again. Realizing she can no longer go back, she gradually frees her mind and body, charging forward according to her desires. Ultimately, she has completely fallen.