Kumi Kanzaki is the PTA president at her son Soshi's school. But when Soshi suddenly becomes truant, the once-stable family dynamic begins to unravel. As Kumi investigates the reason behind his absence, she suffers unexpected violence from her son's homeroom teacher. Traumatized by the incident, she considers pressing charges against the school—only to find the situation escalating far beyond her control. A heartbreaking story of family bonds clashing with societal pressures.