Inspector General Li Tiezhu took over the investigation of a case related to the collusion between police officers and the underworld. The target figures were Huang Zhenxiong, the detective of the serious crime team, and a group of agents under him. Xiong solved many cases with the help of the underworld, but he also accepted the benefits of the underworld and had illegal discipline. Li Tiezhu wanted to collect evidence of Xiong and others, but because Xiong was also a competent policeman and was good at hiding evidence to avoid legal sanctions, Li Yi could not bring Xiong to justice for a while. After that, a new captain named Chang joined the ranks of Xiong. Chang was an upright policeman. Xiong's attempt to buy failed, and Li also took the opportunity to use Chang to collect evidence of Xiong's crime to arrest Xiong, and Xiong committed suicide in fear of crime.

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