The story takes place in the middle of the Ming Dynasty, when eunuchs were powerful, spies were everywhere, and the ambitious princes were ready to make a move, plotting against the law. There were also four villains who committed crimes and made people miserable. It is said that Zhuge Zhengwo (played by Huang Wenhao), the general manager of the Shenhou Mansion, captured the four villains Tang Chou (played by Zhou Muyin), Tu Wan (played by Ma Wenlong), Yan Zhao (played by Qian Yongchen), and Zhao Hao (played by Cheng Cheng) and imprisoned them in Tianshan Death Row. Who knows that the taller the higher, the higher the devil. The four villains escaped from the death row more than ten years later. Under the instigation of the eunuchs, they vowed to fight Zhuge and the four famous detectives Lengxue (played by Zhang Han), Zhui Ming (played by Chen Weiting), Wuqing (played by Yang Yang), and Tie Shou (played by Mao Zijun) who were trained by Zhuge himself. The situation is treacherous, the undercurrent is surging, and the towering capital is full of murderous aura. Surrounded by various conspiracies, the four famous detectives do their best to protect the people of the capital...