Sayaka works as an office lady at a local bank. She was living a peaceful married life with her husband whom she married several years ago. One day, the emergency alarm suddenly rang. It was a bell announcing the arrival of an unexpected bank robbery... Sayaka was so scared she couldn't move, but the robbers approached her as if they had found their prey. Sayaka was forced to provide sexual services, unable to resist in any way... Before she knew it, she began to find pleasure in this seemingly endless nightmare-like situation...