One day, a major accident occurs at a construction site managed by Saka's husband, Daisuke, the owner of Takamori Construction, resulting in the deaths of many workers. While Saka is overwhelmed with grief, Daisuke coldly shifts the blame onto others and refuses to pay compensation. Witnessing his ruthless behavior, Saka is consumed by anger and a desire for revenge. Fueled by hatred toward Daisuke, Saka is then kidnapped and imprisoned—marking the beginning of a brutal revenge tale.