"得赌神毕生绝技的刀仔（刘德华）在龙(lóng )五（向(xiàng )华(huá )强）的陪(péi )同(tóng )下重(chóng )出江湖，代表师父以赌技致(zhì )力(lì )慈善事(shì )业，人称赌侠。遇到欲拜赌(dǔ )神为师号称赌圣的阿星（周(zhōu )星驰）后，两人互展(zhǎn )计谋绝技(jì )，打成平(píng )手。