Lu Yan, the commander of the Jinyi Guards of the Ming Dynasty, dressed as a security guard with a monthly salary of 3,800. On the first day of patrol, he encountered a murder case and was framed as the murderer. He used criminal investigation methods to find the real culprit, used power and tactics to rectify the property, and established an intelligence network covering the entire city. When the criminal police team asked him to be an informant and the underworld giant invited him to join the team - Lu Yan smiled: "I investigate the case and don't charge money, only lives."
