Single mother Sachie has vowed to fulfill her late husband's dying wish: to raise their son to become a doctor. But her son's grades show no improvement, and any sign of inherited talent seems completely absent. One day, a shady admissions broker named Katayama appears, stoking her fears about her son's future. He proposes a backdoor entrance into medical school, forcing Sachie into deep conflict. To honor her promise to her husband and secure her son's future, she chooses a final, desperate path. Gazing at her exhausted son's sleeping face, she hardens her resolve as a mother and decides to offer her body to the broker. For her son, and to fulfill her husband's last wish, she takes one fateful step forward.