At the beginning of the last century, the ruins of the ancient city of Loulan were discovered, leading explorers from all over the world to explore for treasures, and countless precious cultural relics were excavated by foreign treasure theft groups. Chen Xiao, an explorer, has been working hard to stop the bandits from destroying the monuments and stealing national treasures, so he is regarded as a thorn in the flesh of many bandits. In an escape from the bandits, Chen Xiao mistakenly entered an area that has never been set foot in, this place is the legendary "Mirage City."

Zhou Nan (played by Mu Tong), a passionate young man in Bengcheng, is entrusted by market administrator Li Daguang (played by An Zehao) to help him find the lost adopted daughter Li Yan. As the investigation deepened, many clues pointed to the local human trafficking gang headed by Lao Jiu. Li Daguang tried all means to retrieve his daughter, and even sought revenge on Lao Jiu after he turned against Zhou Nan. At the same time, policeman Zhao Jia (played by Huocheng Cheng), who has been investigating the old nine, also found Zhou Nan, and together with him he retrieved the missing Li Yan and uncovered an unknown story about Li Daguang.