In the Warring States era, while Tokugawa Ieyasu sought to unify the nation, a group of rebels loyal to Sanada Yukimura stood against him. Raised from childhood as female ninjas under Yukimura's trusted retainer, Kirigakure Saizou, Shoko and Chinatsu were trained as elite kunoichi. In the winter of Tenbun 11th year, ordered by Saizou, they set out for Kii Province to deliver Princess Yui of the Toyotomi clan to Yukimura. However, along the way, Tokugawa's sorcerer, Tsuzumi Hayato, appeared and forcibly abducted Princess Yui. Hayato plotted a heinous scheme: imprisoning Yui, subjecting her to ultimate humiliation and perverse pleasure, then reprogramming her as a Tokugawa kunoichi and sending her back to infiltrate Yukimura's ranks. Determined to rescue her at all costs, Shoko and Chinatsu infiltrate Hayato's fortress, engaging in fierce combat where their bodies become weapons. What awaits them is an unexpected turn of events, leading to a climax that will leave readers stunned and deeply moved.