He tells fortunes for no money, only for fortune telling.
There are three blood seals on the black leather fortune book: one divination, one section of Yangshou. On the day when the three seals came together, the Xuan Shou died and the inheritance was cut off.
So Chen Mo's rules are very strange - he only waits for fortune telling; he doesn't look at blood relatives, peers, or heavenly secrets. Every time he counted, he was trading his life for the truth.
A secret room murder case tied him into a partnership with Lin Nan, a female detective from the city bureau. She wanted the chain of evidence, and he wanted to read the hexagrams; she said, "Don't do the magic dance for me," and he said, "What a coincidence, I can't do it either."
The secret room where Dumen died, the underground where Liuyao pursued the murderer, the will of the Ming Palace Killing Bureau... Behind each case, there is the same nine-star pattern hanging upside down. There is a person codenamed "Mountain Man" who teaches the murderer in the dark how to choose the time, place and fate - he is not an accomplice, he is using human lives to build a formation.
The last stake in this formation is Chen Mo himself.
[Unit drama solves crimes, one case and one magic number; metaphysics only gives direction, the truth depends entirely on evidence]