The CCAC received a real-name report from the informant Liao Yuping (Zhou Xiuna), reporting that the second-generation second-generation son Cao Yuanyuan (Lin Feng), who is currently in prison, was suspected of bribing the prison supervisor Shen Jiquan (Tan Yaowen) and the corrections officer. Chief Investigation Director Lu Zhilian (Gu Tianle) decided to go deep into the tiger's den and go undercover in prison. In prison, the two gangs of former Superintendent Huang Wenbin (Lin Jiadong) and Cao Yuanyuan, who were sent to prison by Lu Zhilian, were in conflict. Lu Zhilian took the opportunity to get close to Cao Yuanyuan and gain trust. At the same time, Cheng Deming (Zheng Jiaying), chief investigation director of the Independent Commission Against Corruption outside the prison, domestic anti-corruption...