Gunpowder from the Ministry of Industry was stolen, and Yun Zheng, who was in charge of the investigation, disappeared mysteriously. Wuyi Lane spies Lu Yuan and Wang Xu were ordered to take over. As Shangshu Wang's cover-up was exposed and Yushi Cui Zhen was assassinated, the long-forgotten past of Wuyi Lane also surfaced. At the ceremony of offering sacrifices to the heavens, former comrades in Wuyi Lane drew their swords against each other, and a war was about to break out.