忠(zhōng )臣宋沅被奸相(🐽)贾守(shǒu )道(dào )陷害入狱(🔼)，只有携先皇(🕸)所赐的「免(🤴)死(sǐ )铁(🎺)券(quàn )」上(shàng )(🎹)京伸冤，方可免罪(🏴)。贾守道派出(🎾)锦衣卫高思(sī )贤（王侠饰）搜夺(duó )铁券(⚫)，以置(🔸)宋沅于死地；宋妻及女(🙍)宋洁（李菁饰）将(🚥)「免死(sǐ )铁(tiě )券」藏于(🗑)琵琶中(✖)，沿(yán )途(tú )卖(mài )唱(chàng )掩饰。无赖吴三（魏平澳饰）得(dé )(🧚)知宋氏母(🌚)女(📯)真正(🛑)身份，心想利(lì )用她(tā )们换(huàn )贵官高禄，将高思贤引来(lái )(🏂)，混乱中「(🙄)免(miǎn )死(sǐ )铁(🙀)券」被做(🎾)在砖內(nà )，却(🥫)无(wú )人知晓……