The king of monsters, the six-eared monkey, has learned the supreme magic, unified the monsters, and married the princess of the human empire and the holy girl of the demon world. Under his leadership, the strength of the monsters directly threatens the security of the human world and the demon world, making the demon and human worlds hate and fear them. After some premeditation, the demon world and the human world united and invited the immortals to take the opportunity to sneak attack on the six-eared monkey, causing it to be destroyed.
Before his death, the six-eared monkey, the king of monsters, entrusted his daughter Hai Xiaodai and the monster's holy object, the nine-colored magic lamp, to his sworn brother, Taoist Rat. Taoist Rat raised Hai Xiaodai until she was sixteen years old. Considering that her martial arts were not suitable for Hai Xiaodai, he sent her to the Human Realm Academy to study and practice.