In order to understand the mind of the deviant, Jackie musters up a group of Hong Kong felons to help him capture a criminal mastermind.

• 国际刑警鸡骨草（成龙饰）与助手独脚金（元彪饰）联同鹧鸪菜（洪金宝饰）等一班好友远赴日本对付罪犯三哥及东京犯罪组织领袖。