Shy Yuma is troubled by her mother's sudden remarriage and struggles to adjust to daily life. From the moment he first sees her, her stepfather becomes interested in her and gradually starts looking at her in a lustful way. He constantly teases and provokes her, leaving Yuma confused and distressed. Out of consideration for her mother, she cannot express her feelings or push him away. Taking advantage of her silence, her stepfather's actions grow increasingly aggressive. Eventually, a night comes when her mother stays out late for work, leaving Yuma alone at home with him. His desire crosses the line. Raped by her stepfather, Yuma cannot bring herself to tell her mother, and begins a painful life filled with guilt and shame.