故(gù )事发(fā )(🔨)生在清乾隆（张铁林 饰(🔼)）时(shí )期。江湖(🕸)郎中(🔱)洪立(lì )（张国立 饰）(🆖)因(🥈)长(zhǎng )相(🛤)与(🌰)乾隆(lóng )十(shí )分相象，成了皇帝(🌫)的(👋)替身，又因他治好(📼)了太后（(⚫)严敏求 饰(🎩)）多(duō )年的心(xīn )口疼，太(tài )(💆)后与乾(qián )(🥄)隆对他十(shí )(🚥)分赏识，并(bìng )让他(tā )假扮皇(🍮)帝南(nán )巡私访。由于陪其私(😱)访(fǎng )的和(hé )珅（王(wáng )刚 饰）处处(chù )(🥁)打击忠臣、疯(😞)狂敛(liǎn )(🔢)财(❔)，洪立便(🎛)以皇帝的名义与其对(duì )着(zhe )干(gàn )。突然(🤠)冒出的(🙄)乾(qián )隆十大罪状(zhuàng )(⛓)传单(⏰)令乾(🍄)隆(lóng )大怒，他(tā )下令(🚻)彻查，后因意外(⛳)结识印刷此(cǐ )传单(dān )的(de )工(gōng )匠李步韬，二人(rén )(🤘)反(🈁)而结成了知已(🥊)。洪立因无意间发现和珅养女蜻蜓（贾(jiǎ )(🥋)静雯 饰(shì )）身世(💹)之谜，从(😝)此(cǐ )与和(🙎)珅结下(🐡)梁子。乾隆(lóng )为查清地方税案，主动卧底(dǐ )(💸)在戏(xì )班内，历经几番斗智斗勇，终使真相大白。真假皇(huáng )帝你方唱罢我登场(chǎng )连(lián )破奇案......