Chen Xuan is the only descendant of the declining Taoist sect "Tianji Sect". In order to avoid his family's enemies and hide his identity, he lurks in the modern city, pretending to be a lazy and inactive security guard at the city museum. An accidental touch of the ancestral jade pendant activates the [metaphysical deduction simulator] that has been silent for thousands of years - it can explore luck, perform cause and effect, refine Taoism, and determine life and death. From then on, on the surface, he was a salty security guard with a monthly salary of 3,000, who fished and clocked in, but secretly he used the simulator as a blade to kill people, break up feng shui, identify treasures and find leaks, and change fortunes against the will of the heavens; in the city, he solved "scientific unexplainable" problems again and again. Amidst the strange cases in the city, he quietly stirred up the Xuanmen structure, shocked the nobles of the family, and finally uncovered the shocking conspiracy behind the sect's destruction, revitalized the Tianji Sect's orthodoxy, and became the supreme being behind the scenes who controls the lifeblood of the city and watches the fate of the world.
