At the end of the Ming Dynasty, the emperor was incompetent, and the prince of Qing colluded with others to plot a rebellion. The national spy Luo Bing got the key evidence and was robbed and killed. He was seriously injured and was rescued by Mei Xiang and Mei Youling. Mei Xiang died to save Luo Bing. Before she died, Mei Xiang told Mei Youling that his biological father was the current emperor, and asked Mei Youling to complete the mission with Luo Bing. The two came to the capital to find Tan Qi, hoping that she would present the evidence to the emperor. Unexpectedly, Tan Qi was controlled by Eunuch Li and joined forces with Pei Lin to kill the two. Fortunately, the two were well prepared and led Pei Lin to the woods to capture her alive, and told her the true identity of Pei Lin's master, He Xunu, a Western Region Gu woman. Accompanied by another national spy, the two broke into the palace at night to meet the emperor and were caught by He Nuxu. Pei Lin and He Xunu had a deep hatred, so they decided to help the two and discuss countermeasures to rescue the emperor. The emperor held a banquet for the ministers on his birthday. The king of Qing launched an attack to force the palace. He Nuxu revealed his true face and wanted to catch all the ministers in one fell swoop. In the end, the national spies stopped He Nuxu's plan.