忠臣宋沅被奸相贾守道陷害入狱，只有携先皇所赐的「免死铁券」上京伸冤，方可免罪。贾守道派出锦衣卫高思贤（王侠饰）搜夺铁券，以置宋沅于死地；宋妻及女宋洁（李菁饰）将「免死铁券」藏于琵琶中，沿途卖唱掩饰。无赖吴三（魏平澳饰）得知宋氏母女真正身份，心想利用她们换贵官高禄，将高思贤引来，混乱中「免死铁券」被做在砖內，却无人知晓……
Plot Summary:In this stirring saga of the "Martial Arts World," Lo Lieh plays a righteous swordsman trying to protect another hero's wife and daughter from a corrupt minister's murderous plans...two years before he and the director Cheng Chang-ho would become internationally famous for King Boxer.
