讲(jiǎng)述(shù)了(le)武当(dāng)派(pài)张翠(cuì)山(shān)之子(zǐ)张无忌(jì)无意(yì)中卷入(rù)屠(tú)龙(lóng)刀(dāo)而起的江(jiāng)湖(hú)纷(fēn)争之中，因缘(yuán)际(jì)会(huì)练(liàn)就(jiù)一(yī)身(shēn)盖(gài)世(shì)武功(gōng)，主(zhǔ)要是(shì)明(míng)教(jiào)和中原武林之争及(jí)起义(yì)军(jūn)和腐朽(xiǔ)朝廷(tíng)之间(jiān)的对(duì)抗(kàng)