When we first meet many things and many people, we don't always know how important they are to us. If we had known about them first, would we have deliberately avoided that encounter? Even if this were the case, it would not involve so many obsessions and disputes about right and wrong. Tiance, who only guards the soul of the Tang Dynasty with a spear, is deeply in love, but he knows the painful past of Taoist Chunyang, a swordsman who cultivates immortality. Even if the glory falls, it will become a song for a lifetime. It is a pity that the floating life is endless, and the time has passed by.