In Nanshi City, a small northern city, in order to safeguard legal justice, Liao Fanghua arrested the criminal suspect Xue Feng, who grew up with him, and imprisoned him in a detention center. Xiao Lin finally had to release the cunning Xiao Lin under residential surveillance due to lack of evidence. In order to cover up her crime, Xiao Lin pretended to be law-abiding on the surface, but secretly destroyed the evidence step by step, and attempted to kill Liao Fanghua's son, break Liao Fanghua's will, buy herself time, and achieve the purpose of escaping from the law. Liao Fanghua led the police officers to peel off the bamboo shoots layer by layer, firmly grasping the internal conflicts and evidence clues of Xiao Lin's criminal group, and removing obstacles one after another. On the surface, they were fooled by Xiao Lin's poisonous plan, but in fact they followed it. Zhang Yun, who thought he was sure of victory, finally took action on his own. When he tried to retrieve the evidence and destroy it, he was caught by Liao Fanghua. The evidence was conclusive and he could not escape the law.