Hitomi, a married woman, returns with her husband to his family home, only to find his younger brother overwhelmed by the burden of caring for their aging father. Resentful and looked down upon by his older brother, the younger brother unleashes his pent-up rage on Hitomi, violently raping her. He then forces her to perform sexual acts on their senile father. Once he discovers the pleasure of controlling her, he relentlessly continues to humiliate and dominate her body, turning her into his personal plaything.