When yin and yang are constant, it is called righteousness; when yin and yang are out of order, it is called resentment.
In contemporary cities, under every subway tunnel, every unfinished building, and every late-night overpass, there are things sleeping that should not be awakened.
Shen Du, a flea market vendor, makes a living by collecting and selling "old things that others dare not want" - photos of deceased persons, old memorial tablets, and urns with broken incense. He is born with the ability to see "things" that others cannot see, but he only thinks that he is mentally ill. Until one day he received a dressing box from the Republic of China. There was no comb in the box, only a strand of a woman's hair and a piece of yellow paper with her birthday written on it. That night, a woman wearing a red cheongsam sat in front of his stall and asked him, "Where is my comb?"
He was involved in a secret agency called the "City God's Office". This nominally folk culture research unit is actually a yin and yang coordination organization that has lasted for thousands of years. Most of its members are the last descendants of various Taoist sects. It is responsible for monitoring and handling the increasingly frequent supernatural events in the city. And the ancient copper coin around his neck, whose origin no one could tell, was actually the seal key left by seven Taoist masters when they sealed the "City God's Seal" fifty years ago.
Fifty years ago, the seven masters swore an oath with blood and sealed the City God's Seal underground, locking the highest seal of Yin and Yang. Fifty years later, the seal has been loosened and grievances are flowing. A thousand-year-old evil sect with the creed of "urban development requires sacrifice" is secretly collecting grievances and trying to reshape the world order.
Elevator shadows, demolished weddings, the return of the dead, the mass grievances in the subway hub...
Behind every urban legend, there is a forgotten cause and effect.