Before ascending to immortality, Lu Dongbin, founding patriarch of the Pure Yang Sect in the Tang Dynasty, left behind a book called The Immortal's Scripture of Eternal Life, throwing the martial world into turmoil. Duan Xifeng, a second-generation disciple of the Pure Yang Sect, descends the mountain to temper himself. He falls in love with Yan Honglian, a demoness from the Valley of Villains, and their son, Duan Tianya, is born in a mountain-god shrine. Hunted by the entire martial world, the family goes into hiding in the Valley of a Hundred Flowers in the Qinling Mountains. Ten years later, the martial arts sects, all vying for The Immortal's Scripture of Eternal Life, use the pretext of killing an enemy of the martial world to track down Duan Xifeng and his family, then lay siege to the valley. Duan Xifeng and his wife are killed, Duan Tianya is swept away by the river, and his younger sister, Duan Qingyan, goes missing. Duan Tianya wanders the martial world, only to be betrayed by his first love's family and branded an enemy of the martial world. He narrowly escapes death, then gets caught up in internal strife within the Beggars' Sect and other schools. He masters the martial arts in The Immortal's Scripture of Eternal Life, reunites with his sister, but the woman he loves disappears once again. Just as he is about to avenge his family, he discovers that his enemy is not just one person. Soon afterward, The Map of Mountains and Rivers, sealed away at Qinglong Temple, vanishes. Framed by villains, he becomes the enemy of the martial world, hunted by all. He later discovers that the Divine Strategy Army is plotting a shocking scheme to destroy the entire martial world and sever the Tang Dynasty's dragon vein, putting the dynasty and all the martial arts sects on the brink of ruin. Guided by a virtuous, enlightened monk of Qinglong Temple, Duan Tianya lets go of his hatred and uses his own flesh and blood to stop the catastrophe...
