Working as a maid for the Hirai household, Misako endured repeated sexual harassment from the master, Hideo, and his eldest son, Ichiro, while silently bearing the pain as atonement for having once placed her own son in a care facility due to financial hardship. She bore their abuse without blaming herself, until she found solace in the kindness of the younger son, Akira, who always treated her gently and made her smile. But one day, Misako noticed something hanging on Akira's chest—the very same amulet she had given her long-lost son as a symbol of their bond, the day they were forced to separate.