Chen Zilong (donnie yen) selected by the Hong Kong police undercover work into the underworld, collect underworld kingpin "bear" (ch0u) criminal intelligence. Who lives, Chen Zilong has feeling bored, hope your early reply. Bear with the tacit organization repeatedly collapse by the police, must have the undercover to internal. Began to mistrust of each hand of genocide. Chen Zilong afraid of identity was revealed in the morning and evening, eager to find his boss zhang Sir (Ronald cheng). However, zhang Sir Think is a once-in-a-lifetime opportunity, can break down altogether bear all of the organization. Hope Chen Zilong in a last-ditch effort, accompanied by the most interest within the organization leader Sunny (Andy on) to mainland China, investigate their crimes in hainan island, so that all to justice. In the mainland, Chen Zilong and Sunny is a mysterious assassin "blade" (zhang), Chen Zilong in a extremely dangerous state, it is life is death have been unable to control...
