忠臣宋沅被奸相贾守(📼)道陷害(🐌)入狱，只(zhī )有(yǒu )携先(xiān )(🕟)皇所赐的「免死铁券」上京伸冤，方可免罪。贾(jiǎ )守道派出(chū )锦衣卫高思贤（王侠(xiá )饰）搜(sōu )(😎)夺铁券，以(yǐ )置宋沅(yuán )于(🤷)死地；宋妻及(👁)女宋(sòng )洁（李(lǐ )菁饰）将「(🐖)免死铁券」藏于(yú )(🗑)琵琶(pá )中(✖)，沿(yán )途卖唱(🚑)掩(🐶)饰。无赖吴三（魏平澳饰）得(🧚)知宋(🔩)氏母女真(🚨)正身份(fèn )，心(🔢)想利用她(tā )(🌑)们(men )换贵官高禄，将(jiāng )高(gāo )思(🔝)贤(xián )引(🐑)来(lái )(🏂)，混(hún )乱(🤸)中「免死铁券」被做在砖(🈴)內，却无人知晓(xiǎo )(🔔)……(🤲)