Suspense criminal investigation + traditional culture (divination in the Book of Changes) + urban mystery
The fourth generation of the Shen family has been doing fortune-telling, and their ancestors taught that "Youh hour does not count as a Yin hexagram." When modern criminal investigation encounters ancient divination, and when a criminal policeman who does not believe in fate partners with a divination master who knows everything, the truth is hidden in the gap between yin and yang.
