Ye Yuan, the young general of the Guardian General's Mansion, is framed by villains, leading to the ruin of his entire family. He enters Kunlun to learn the Ninefold Sword Intent. When descending the mountain to fulfill a marriage pact, he is fobbed off by Madam Liu of the Marquis Shen Mansion with the second daughter Shen Qingyi, who is blind in both eyes. Ye Yuan sees through Shen Qingyi's affliction of the ancient evil art, the Demonic Devouring Sword Seal, agrees to the marriage, and resolves to cure her. The two join hands to repel powerful foes, travel far to the extreme northern Cold Abyss to seek a spiritual medicine, and gradually uncover the conspiracy of Xie Kui, the remnants of the Heavenly Evil Sword Sect from a hundred years ago. Finally, fusing sword intent with the sword embryo heart seal, they break the formation together to slay evil and pacify the calamity of the Heaven Continent.