The Grand Preceptor of the Tang Dynasty, the supreme leader of Bu Liang Ren, possesses unparalleled strength, a terrifying existence that no one can defeat. Only the emperors of successive dynasties know his true identity: Yuan Tiangang, a Taoist priest from the reign of Emperor Taizong. He achieved immortality through elixirs and secretly organized Bu Liang Ren to serve the Tang emperors.