Tianjin secret agents are the "yin and yang non-staff officers" used secretly by the government to handle supernatural murders and sinister cases, and are the local investigators of the underworld in Tianjin. In Tianjin during the Republic of China, the Feng Shui police secretly investigated a series of mysterious cases. Every time a case was solved, Tianjin's ground trembled - and the murderer was using a century-old method to cut out the city's lifeblood inch by inch.
