Lu Tingxiao told Wen Renjing the true identity of Fang Xianxun. Although Fang Xianxun is from Yugou, Lu Tingxiao still can't completely let go of his guard against Xianxun. Lu Tingxiao noticed that someone was following him secretly, so he went directly to Song Zhisu, the mastermind behind the scenes. It turns out that Song Zhisu's real identity is Qin Zhao, the owner of Yugouling. Qin Zhao came this time with an imperial decree, and the emperor ordered Yin Sishen to assist Qin Zhao in capturing Lin Xie, the general of the Northern Kingdom. But Qin Zhao didn't trust Lu Tingxiao, and he insinuated that Lu Tingxiao and the Beiguo spy Lin Xie had been very close. Everyone in Boqingguan drinks and celebrates together, Fang Xianxun took the opportunity to steal the southern country defense map, and officially broke with Lu Tingxiao and Wen Renjing. Wen Renjing persuaded Fang Xianxun to return the defense map, Fang Xianxun told the truth that King Lian was killed by him. Wen Renjing avenged his father, pierced Fang Xianxun's chest with a sword, Fang Xianxun fell into the cliff.