猪肉档老板娘朱萤娇（龚嘉欣饰）天生神力，却得了会生胡须的怪病，渴望寻找「四十二章经」宝藏內的神药治病。大学中文系教授章经（陈豪饰）多年前已醉心寻找这个传说中的宝藏，惟因一次事故大受打击，一直饱受失眠症困扰。数学天才邵桂芝（江嘉敏饰）机灵聪敏，对急症室病房男护士柯建宁（周嘉洛饰）一见倾心。桂芝遊走于正邪之间，也极想找到宝藏，以求一朝发达。章经、萤娇和桂芝因缘际会之下相遇，为抢夺宝藏而各出奇谋，争夺过程中开展了人性的善恶争战，斗过你死我活……
Jim Phelps is the new leader of the Impossible Missions Force, with no explanation, or even reference made, about the departure of predecessor Dan Briggs. First up for Phelps is a mission involving the drug trade. Cresnik and Walters have cornered the heroin market and sell it at a handsome profit to gangs around the world. Phelps devises an operation which will drive a wedge between the heroin dealers and their customers.
