The anti-drug operation is about to close, but the main culprit is brutally shot in the head by a mysterious killer; on the other hand, a real estate developer who is about to participate in the bidding is suddenly involved in a bizarre car accident... Crimes are frequent, and the leader of the Hanyong Group, the evil gang in Yucheng, Qin Han, is engaged in power-for-sex transactions, while his brother Qin Yong kills people and sells drugs in secret to make a lot of money. Policeman A Zheng is ordered to go undercover in the Hanyong Group and fight wits and courage with the Qin brothers. The operation is full of dangers and he is almost betrayed by the black umbrella of the police force... Who is the umbrella of the evil gang? A thunderous operation to eliminate evil and break the umbrella is imperative!