In the mist of steam and secrecy, how will a traveler with Taoism in his possession use cinnabar and yellow paper to protect himself and the lights of mortals?
In 1348 AD, Li Changan traveled to the small border town of Intis and possessed an ordinary librarian. He just wants to hide himself and live a stable life. But a serial murder case, a strange fog that only appears late at night, and a group of extraordinary people preparing to move in the dark are breaking the peace he has worked so hard for.
When he was forced to take action as "Mr. Fu", the hidden existence in this world began to realize that there was a variable that could not be analyzed and had quietly entered the game.
