Returning home to her parents' house after a long absence, Miko reunites with her younger sister, Keiko, reminiscing about their past. Their mother, Kimie, never showed any maternal affection, constantly bringing men home to indulge in drinking, gambling, and sexual affairs. Among them, Kimie's lover Nakazawa develops a strong sexual interest in Miko, making lewd advances toward her. As memories resurface, the dark truths of their family's twisted relationships come back into the light.