Li Bai, a poet from the Tang dynasty, hides his identity under that of a masked warrior to try to recover a sacred stone and clean the good name of his people.

幼年時目睹碎葉城之戰慘烈情形的幼年李白，抱持著老夫子濟世救人的教誨，與恩師裴旻傾授的一身武藝，踏上了尋求公平力量的道路。初入長安，壯志未籌，心懷悲憫的李白，一邊受安西都護府舉薦以詩文才華入仕，一邊則化身夜行俠對抗惡徒。不料血雨腥風的陰謀正在暗處伺機而動，方術中玄機重重，沉睡的長安能否化險為夷？李白能否在對抗惡匪過程中成長為真正經天緯地之英雄？