A long time ago, there was a butterfly demon who destroyed his thousand years of Taoism in order to save a mortal. In order to survive, it sealed part of its soul and demon power in a crystal. Since then, thousands of years have passed and the butterfly demon has still not recovered its demon power and returned to the world. Until now, with the birth of a girl, everything will be broken. And this girl will become a new myth in the entire world of immortality.