Ruthless gangster Guts pulls off a heist of diamonds, then enlists the aid of longtime triad member, Fei, to arrange a buyer for them. But when Guts double crosses the buyer, Fei ends up with the diamonds, wanted by both the cops and Guts....

A bunch of criminals led by “Judge” robbed a gambling house. The car thief Wei, who provided cars for their illegal operations, was determined by Sir Luo as a suspect in that case. Inspector Zhang Tiezhu was dissatisfied with Sir Luo's approach and released Wei and asked to cooperate with him. Wei was involved in the murder case and had to cooperate with Zhang Tiezhu. The police and the thief began to cooperate......

B is a plainclothes criminal policeman who lives in a small old apartment with mother. He is warm-hearted and his bold handling of cases has greatly opened the eyes of the new colleague, Jie. Jie is very different from B, who only wants to pass the exam and be promoted. B suppresses two big shots in Shanshang Village and Shanxia Village respectively, Xiaohei and Hongfan, and buys many clues through Hongfan’s heeler, drug dealer Cheng. B makes contributions to get the information of the crime, Jie also gets a reward from this. Their friendship is growing day by day. Soon, Cheng falls off the wagon and makes a big mistake, gets beaten by Xiaohei and Hongfan to death. While B investigates the cause of Cheng’s death…...