In order to deal with gangsters, they can be more gangsters than gangsters, but the police will never become gangsters! A cowardly little gangster was released because there was no evidence of murder. His inflated vanity gradually turned him into a big gangster who did all kinds of evil. A witty and brave criminal police spared no effort to find evidence and pursued the gangster relentlessly. During this period, a series of unexpected and thrilling police-bandit battles took place... After being released from prison, Liu Changjiang's vanity was extremely inflated. By chance, he met several ruffians who had admired him for a long time. Soon, a new evil force was formed. Liu Changjiang, who was becoming more and more arrogant, would not give up the case of Wang Dahu, and began to accuse Su Yan endlessly. Those maliciously fabricated charges were imposed on Su Yan. Faced with all this suddenness, Su Yan was a little unprepared. He withstood the pressure from all sides and started a new round of investigation work...