Haigang City senior police detective Lin Yu and his forensic partner Su Yao were involved in a mysterious burglary case. Professor Chen's stolen notebook contains research results on dangerous drugs that can control human thinking. During the investigation, strange death cases emerged one after another, but all clues disappeared mysteriously. A mysterious letter guided them into an abandoned factory. After being attacked, they discovered the secret laboratory of the criminal gang behind it. The two of them peeled off the cocoon in the thick fog, looking for the missing evidence book, and started a life-and-death game with the evil forces. Can they uncover the truth and make the mastermind behind the scenes invisible?
