"得(dé )赌神毕(bì )生绝技的刀(dāo )仔(zǎi )（刘德华）在龙(lóng )五（向(xiàng )华强）的陪同下重出江湖，代表师父以赌技致力慈善(shàn )事业，人称赌侠。遇到(dào )欲拜赌神为师号称赌圣的阿星(xīng )（周星驰）后，两人互展(zhǎn )计谋(móu )绝技，打成平(píng )手。