In the Dayu Dynasty, Haiyan and Heqing were clear, and all nations came to court. However, under the prosperity, the old gods are resurrected underground, Taoism, Buddhism and immortals are all twisted monsters, and incense worship is cognitive pollution. Li Shuo traveled through time and was on death row at the beginning, facing the desperate situation of being executed five days later. In order to survive, he relied on his previous life's criminal investigation and forensic knowledge and the mysterious "Senluo Ancient Palace" to solve a series of secret room unsolved cases, clear his name, and became a "trainee spy" at the lowest level of Dayu Tianshu Academy. In this dark world where cultivating immortality equals madness and power comes with a curse, Li Shuo abides by the "acting method" and walks on the edge of reason and madness. Externally, he is a ruthless and decisive crime-solving machine; above the Senluo Palace, he is the mysterious "King of Hell" who controls everything. From being a trainee to a governor of a state, Li Shuo used the destiny of the people as a sword, used distorted cognition to counter the ravings of the old gods, and blazed a bloody path in the strange folk customs and the undercurrent of the court. "Sir, the villagers are all eating Tai Sui meat. They say it is the elixir of longevity." Li Shuo sneered and pulled out the embroidered spring knife from his waist: "Then chop them up together with Tai Sui and feed them to the dogs."