The story takes place in the Kingdom of Jiuzhou. A thousand years ago, vicious beasts overran the kingdom. The Emperor used powerful magic to drive them all beyond its borders. In return, he was acclaimed as Emperor and gained the power of immortality. Now, a thousand years later, the beasts beyond the borders have spent a millennium growing stronger. They keep crashing through the barrier and invading, while the Emperor's magic grows weaker by the day. This year, the barrier was finally breached, and vicious beasts slipped inside.
That same year, the Imperial Astrologer divined a new prophecy: two girls, each born from a mythical beast, had fallen into the mortal world. One was a phoenix who could save Jiuzhou from disaster, while the other was a nine-tailed fox destined to wreak havoc upon the world. Can the people of the prophecy save Jiuzhou from disaster? The story begins here.