During the peaceful period of Song and Liao, Tang Ziyan, an agent originally trained by the secret organization "Phoenix Fire Army," is placed in the Imperial City Department in Beijing. While Tang Ziyan wanted to quietly quit and have a peaceful remainder of her life with her husband Zhou Qian, her husband was taken away by the Phoenix Fire Army to threaten Tang Ziyan. She now has a new mission set by the army: To assassinate the visiting envoy of the Northern Dynasty. During this period, Zhou Qian'an was shot and killed by the Phoenix Fire Army and Tang Ziyan is determined to take down the Phoenix Fire Army. She pretended to not be wavered and continued to plan the next step of the assassination plan, but is surprised to find that the target is just by her side. In the end, Tang Ziyan along with the envoy work together to defeat the Phoenix Fire Army, quelling a scourge and returning peace to Beijing....

Dali Temple's Official Qi Ling received the emperor's secret edict again, and was ordered to track down the "Kowloon Pen" with supernatural magic power and crack its secrets. After several investigations, Qi Ling found that this case is actually related to his dead father. As the mechanism of Jiulong Pen were unveiled layer by layer, the case gradually became clear, but at this time, various forces in the DPRK and China were also surging, and everything is not as simple....

Zhou Kun is focused on cultivation while Li Jiao Ran is focused on getting rid of evil. They are childhood friends who have been quarrelling with each other since young but a mysterious murder case brings them together. Zhou Kun is moved by Li Jiao Ran as she risks her life to investigate the case. Both of them rush to Youming Town to discover the truth behind the murder case....