"得赌神(shén )毕(bì )生绝(jué )技的刀(dāo )仔（刘德华）在龙(lóng )五(wǔ )（向华强）的陪同下重出江湖，代表师父以赌技致力慈善(shàn )事(shì )业，人称赌侠。遇到欲拜(bài )赌神为师号称赌圣的阿星（周(zhōu )星驰）后，两人互展(zhǎn )计谋绝技，打成平(píng )手。