Zhou Lin was wrongly imprisoned for five years. Silence is a shield and insight is a sword. Strange cases occurred frequently in prison. He followed the clues and pulled out the fig leaf of the police's "Integrity Operation" - his wife was silenced because she uncovered high-level corruption.
Shen Zhao lurked with the autopsy loophole, Lin Sui secretly delivered a letter carrying his sister's unjust debt, and the crazy killer Ajiu gave key testimony before his death. When the live broadcast footage pierces the iron window, what Zhou Lin wants to tear open is the abscess in the entire system.
