The typhoon signal is hoisted in Hong Kong. Under the cover of the fierce wind, four tons of methamphetamine are entering Hong Kong, pending to be sold on the dark network. A cyber revelry of druggies is about to be unveiled, as the storm brews in the quiet Victoria Harbour. Police has arrested the "boss" behind the scenes and nip the "drug network" in the bud in no time, that pushed their undercover intelligence to the narrow road. In the centre of the storm, undercover agents, police officers, drug lords, black, white, and gray entangled.