Yu is a two-armed swordsman who is betrayed by a jealous rival, but initially seeks a life of simple pleasures until an accidental meeting with another patriot sets him back on the road to bloody, brutal vengeance.

哪咤（傅声）生于三千多年前的商朝，父亲李靖（卢迪），是当时的总兵官，镇守陈塘关。在纣王的统治下，人民饱受压迫，哪咤总是抱打不平而闯祸，因此令其父增添不少麻烦。父子最终水火不容，为救全家哪咤不惜削骨还父削肉还母。然而，哪咤却为一位神仙太乙真人（李允中）以莲花令其复活，并赐给他两件宝物，去解救受苦的百姓。

A noble swordsman, whose arm had been chopped off, returns to his former teacher to defend him from a villainous gang of rival swordsmen.