The modern fictional city "Cangnan City" is prosperous on the surface and ruled by law, but undercurrents are surging at the bottom (gangsters, smuggling, and underground casinos are intertwined); police factions include both righteous forces and shadow organization infiltrators; overseas criminal groups collude with local evil forces, and shadow organizations are behind the scenes. Under the guise of "controlling order," they control serial murders, unjust, false, and wrongful convictions, officialdom, and commercial crimes, and act in secret.