The Independent Commission Against Corruption received a complaint from the Correctional Services Department, which suspected that correctional officers were accepting benefits from prisoners and smuggling mobile phones into prisons.The ICAC dispatched investigators to the Correctional Services Department to investigate and found that two correctional officers Yang Zhilin (played by Luo Tianyu) and Li Jiwen had a close relationship with an inmate named Zhuhao.Yang Zhilin, who appears to be upright, has been performing well at work and seems to have nothing to do with the incident.On the contrary, ICAC officers discovered that Li Jiwen secretly solicited benefits from the visitor Zhang Xiaolan.The ICAC determined that Li Jiwen was a black sheep, but there was no further evidence that he assisted Zhu Hao in smuggling phones.While the case was reaching a stalemate, the Correctional Services Department decided to set a deadline for the warehouse search operation in order to prevent Zhu Hao from continuing to control outside crimes through the phone.Integrity officers have to race against time to find enough evidence before the warehouse search operation.At this time, Zhong Qiaoling and Ding Xin accidentally discovered the unknown side of Yang Zhilin...