During the "Dajing" period of the fictional dynasty, the order of the three realms collapsed due to the incompleteness of the "Book of Yin and Yang", and the boundaries between humans and monsters were blurred - there was a well in Chang'an that stole fat and set fire to an unjustly dead embroiderer, there was a wuzhiqi in a deep pool in Shu who had been chained for thousands of years, and the silent head of a kidnapped woman hung on a tree branch in the miasma of Lingnan. Shen Yan, a down-and-out scholar, awakens the power of "Tongyu" due to the jade pendant inherited from his family. He can understand the voices of monsters and ghosts, but he will also gradually assimilate their habits; The two were forced to work together, starting from the Chang'an arson case, and traveled across various states. They not only wanted to resolve human prejudices against monsters, but also fought against the conspiracy of the "monster" who was using fragments of the monster mirror to tamper with the fate of monsters in an attempt to exterminate the alien species in the name of "human monsters have a different path."
