One of the most densely populated areas in the world, Mongkok is the hotbed of illicit business. A farm boy from Mainland China is hired as a killer and is forced to enter into the coincidence of gangs of Mongkok. He meets a call girl from his home village and saves her from the gangsters. The arrival of him tenses the police and the triad. Under flashy neon lights, they are rummaged around in Mongkok by police and gangsters. Who wlIl find them first, the lawful force or the lawless one?