In one year from 2999 to 3000, the Earth began to expand until it accommodated the entire solar system, and then the Earth split into the heavens and the earth. Due to the fission of the earth, the genes in the human body also began to fission. Some humans turned into the demons in the heaven, some humans turned into the gods in the heaven, and the remaining humans turned into the royal family in the earth. Therefore, the heavenly demons and the heavenly gods fight for the dominance of the heavens and the demons' status in the heavens. A hundred years later, the two tribes of demons and gods decided to call a truce. In order to live in harmony, they made a rule without the knowledge of the royal family: no one from the demon and god tribes could intermarry with the royal family, only intermarriage between the heavens was allowed. Under this treaty of annihilating the royal family, the heaven gave birth to a clan of demons and gods with the power to destroy the heaven. However, because of this, some demons and gods relied on the protection of this powerful power to secretly marry the royal family, violating the rules. What no one knows is that this 1% chance happened to give birth to the pure blood of the Underworld clan with the power to destroy everything in front of them. They have the purple wings of the demons, the golden wings of the gods, and the blue wings of the royal family. In order to maintain the heavenly alliance, the heavens killed their parents. As the heavens learned about his power, they also issued a wanted order for them. At the same time, the god kings and the demon kings who were born were also wanted. After the royal family found out, they began to secretly fight with the heavens. It was under such circumstances that 18 years later, they met and the Heaven-killing War began.