Criminal police captain Cheng Lie was framed as a serial killer and was wanted by the entire network within seven days. The truth was buried layer by layer. Forensic doctor Su Yan discovers a fatal flaw in the autopsy report. Underground intelligence dealer Lin Xiao uses his police badge as a bargaining chip to provide key clues, while his former boss Zhao Zhenguo struggles between saving his daughter and saving his life. When Su Yan detonated the recording evidence, Han Xiao broke the ban and called up the dusty surveillance. Cheng Lie personally revealed the real murderer at the shooting scene - it was actually a suspect he had let go. The verdict was overturned in seven days, and the police badge was stained with blood, but the real mastermind was still smiling in the shadow of the provincial department.
