During a routine maritime patrol, Hong Kong Customs seized a cargo ship containing a large number of lethal weapons. During the investigation, it was bombed and robbed by a group of overseas forces. In order to track down the truth of smuggling, Zhang Yunnan (Jacky Cheung) sent his subordinate Zhou Zhengli (Nicholas Tse) to travel overseas with Interpol to travel through the huge and complex arms black market. Zhou Zhengli, who was under heavy artillery fire, had just begun to trace clues, but the bad news suddenly came from Hong Kong. It turned out that there was another secret to the arms theft...