This film tells the story of Zhang Chenfeng, the head of the Major Crimes Unit, who is framed as a murderer by Yu Jianming. After Zhang Chenfeng is arrested, with the help of criminal investigation expert Zhou Yang and other members of the Major Crimes Unit, the real serial killer is successfully brought to justice.

• Yu Rongguang
• Samuel Leung Cheuk-moon
• Du Yuming
• Jackson Liu