Amidst the misty cloud seas and the boundless sky, who among the countless beings does not yearn for it? The path of heaven is illusory, and no one can truly glimpse it. In the vast world of mortals, who does not desire eternal life? A couple bound by a seven-lifetime grudge, the millennia-old enmity and love between the righteous path and the demon sect. One person, one ancient sword, how will he face the entire world...