55-year-old widow Kaede begins working as a temporary employee to fund her son's study abroad. One day, while working late, her company's president offers her a full-time position and forcibly takes her right then and there. Witnessing the scene, her son becomes aroused and, upon returning home, confronts his mother—not with anger, but with growing desire. Their relationship gradually deepens. The womanly desires long dormant within Kaede awaken, driving her into a passionate, forbidden affair with her son, transforming their bond into an illicit mother-son incest.