南宋末年，蒙古大军主帅蒙哥率军进攻樊城，为守将张天顺射瞎左眼，樊城即破，张天顺见情势不妙，将黄龙剑交由部将范国兴作为日后号召群雄的信物，随即自刎并吩咐范国兴带其首级诈降蒙哥，范国兴至敌营趁机刺杀蒙哥并冲出突围。

　　范国兴自此蒙上“卖国求荣”的恶名。后来与独子范秋生隐姓埋名，深居乡间，二十年后，为武林人士发现，父子二人投靠“中原第一剑”冯保，孰知冯保已为元军收买，范国兴遂将冯保杀死，自此更为武林人士唾骂。

　　范秋生与父亲流亡时，结识了无情谷谷主柳湘云的女儿柳清莲，以及毒如来、穆灵芝师徒。柳湘云为报复“一剑穿心”仇万仞当年离她而去，命柳清莲杀死仇万仞。

　　急如火带着自小为蒙古人收养的张崎，并称张崎为张天顺之子，并勾结名剑门门主凌楚风，进行对武林反元势力的分化。

寶祐六年，蒙古兵大軍壓境，樊城守將張天順為救樊城百姓，把藏有抗元名冊的黃龍劍交予偏將范國興，然後自刎，讓國興送頭降敵。國興自此蒙上賣國賊之名，與兒子范秋生於鄉間隱姓埋名生活，多年後為「一劍穿心」仇萬仞發現。秋生與國興流亡期間，結識了柳清蓮，對方因奉母親之命，執意要與萬仞決鬥，親手將其殺死。另一邊廂，自小為蒙古人收養的張崎被安排以天順之子的身分出現，並與名劍門掌門凌楚風勾結，企圖消滅中原的抗元勢力。

寶祐六年，蒙古兵大軍壓境，樊城守將張天順為救樊城百姓，把藏有抗元名冊的黃龍劍交予偏將范國興，然後自刎，讓國興送頭降敵。國興自此蒙上賣國賊之名，與兒子范秋生於鄉間隱姓埋名生活，多年後為「一劍穿心」仇萬仞發現。秋生與國興流亡期間，結識了柳清蓮，對方因奉母親之命，執意要與萬仞決鬥，親手將其殺死。另一邊廂，自小為蒙古人收養的張崎被安排以天順之子的身分出現，並與名劍門掌門凌楚風勾結，企圖消滅中原的抗元勢力。

In the sixth year of Baoyou, the Mongol army pressed the border, and Fan Chengshun general Zhang Tianshun saved the people of Fancheng, handed over the yellow dragon sword containing the anti-yuan roster to the partial general Fan Guoxing, and then killed himself, so that Guoxing sent his head to surrender the enemy. Since then, Guoxing has been known as a traitor, and his son Fan Qiu was born in the countryside and lived incognito, and many years later he was discovered by Mrs. Qiu Wan, who "pierced the heart with a sword". During Qiusheng and Guoxing's exile, he met Liu Qinglian, who was ordered by his mother to insist on a duel with Mrs. Wan and killed her with her own hands. On the other side, Zhang Qi, who had been adopted by a Mongol since childhood, was arranged to appear as the son of Tianshun, and colluded with Ling Chufeng, the head of the famous sword gate, in an attempt to eliminate the anti-Yuan forces in the Central Plains.