Fei Ren (played by Zhou Jialuo) and his sister Gao Qiang (played by Wang Haoer) became constables of Luren County for money. The new chief constable Huang She (played by Cao Yonglian) sent Fei Ren to the palace city, a no-man's land, to look for the missing spy. Murong Gongzi (played by Zhu Minhan), a subordinate of Ban Dou (played by Wei Jiaxiong), the leader of the Banlong Clan, accidentally brought Fei Ren into the palace. Although the city seems prosperous on the surface, the four major sects are fighting secretly. The late sect leader once promised that whoever could pull out the sword, Xu Yimen's eldest sister Fu Ling (played by Chen Ying) would marry him; Fei Ren and Gong Zi confidantly pulled out the sword together and became the two candidates for son-in-law! The four factions are plotting against each other, the mastermind behind the scenes is constantly plotting, and the identity of the spies is shrouded in mystery. Fei Ren is a candidate for son-in-law, and the spies in the government office have to continue their search. Good or bad luck is unpredictable...