Era background: The Tang Dynasty was prosperous, with clear politics, prosperous economy, and prosperous culture.
Main location: Chang'an City, as the capital of the Tang Dynasty, is the main place where the story takes place.
Social environment: Although it is prosperous on the surface, there are undercurrents and various forces are secretly competing.
Detective Li, the youngest detective in the Tang Dynasty, is smart, witty and courageous, good at reasoning and has a persistent pursuit of the truth.
Xiaohui, Detective Li's assistant, comes from a poor background, but is extremely resourceful and good at gathering intelligence.
The story of two people solving a crime in Chang'an City.
