Aoi lives alone with her father after losing her mother. One day, returning home, she finds an unfamiliar man introduced as her father's acquaintance. The man starts staying at their house, and soon after, her father disappears. Several days later, the man's accomplices arrive and inform Aoi that she has been sold to settle her father's debts. From that moment on, Aoi's life becomes a relentless nightmare of assault and sexual abuse at the hands of these men. Her peaceful life with her father collapses in an instant, as she is helplessly driven into despair and humiliation.