Di Renjie, who had just arrived in Chang'an to take office, witnessed a strange event on the bustling streets: a qilin burning with a faint flame all over its body caused a commotion at the Shangyuan Festival lantern market, causing countless injuries. Di Renjie saves the child and collaborates with the unscrupulous handsome Lin MusenJointly pursuing the Fire Qilin, but allowing it to escape. Empress Wu Zetian was enraged and ordered the Minister of Dali Temple, Xue Xin, to investigate this case. Due to various misunderstandings, Di Renjie and Xue An'an, the daughter of Xue Xin, became happy enemies, but the two of themWe have to work together to investigate the case of Huo Qilin. Di Renjie discovered a rare hairpin at the lantern market on that day, leading the clues to the Qi Prince's Mansion, and even involving the love between the young prince Li Di and the brothel dancer Murong LingA love story. As the investigation deepened, Di Renjie found that the case became increasingly complex and confusing. The secret technique of Tuhuoluo in the Western Regions and the disaster of extermination ten years ago