忠(zhōng )臣宋沅被奸相贾(🥇)守道(dào )陷害入(🍩)狱，只有携先皇所(🛍)赐的(🕰)「免(🤴)死铁券」上(🎹)京伸冤(🐉)，方(fāng )(🌰)可免罪(zuì )。贾(jiǎ )(🐮)守道派(😧)出锦(📿)衣卫(wèi )高思贤（王侠饰）搜夺铁券，以置宋(sòng )沅于死(🗄)地；宋妻及女宋洁（李菁(jīng )饰(🚉)）将「免死铁券」(🎫)藏(🥞)于琵琶(🍮)中(zhōng )，沿途(tú )卖唱(chàng )掩(🐶)饰。无赖(lài )吴(🐖)三（魏(wèi )平澳饰）得知宋氏母女真正身份(fèn )，心想利用她们(🎛)换贵(guì )官高(gāo )禄(💻)，将高思贤(✋)引来，混乱中「免死(sǐ )铁(tiě )(🙀)券」(💪)被做在砖內，却无人知晓(xiǎo )……