Yuki Heiwajima, a married woman working as a corporate secretary, is asked by the company president to review the sales department's expenses. While working late into the night, she discovers unaccounted funds not listed in the expense reports. When the sales manager learns of this, he attempts to silence her through coercion, but Yuki refuses. He forcibly overpowers her on the spot. Yuki ends up recording the incident, and fearing her husband will find out, she is forced to submit to the manager's demands—eventually surrendering her body to clients and superiors as a sex slave.