A world where only vampires exists. A world for humans and vampires. The world for vampires is where there is peace and happiness, same goes for the human world. Long ago, human and vampires signed a treaty to never attack each other so that there would be no war between them, but after centuries (this day), on the human world, the President of the human world, Taecyeon(from Korea), was paranoid that the vapires would attack them without warning. So, Taecyeon sent people who were skilled to kill vampires to go and destroy not only the vampire people, but also there world so that there would be no threat against them. They were told to use what ever was there weakness and that weakness was holy water.

The king and queen for the vampire world, Nichkhun and Tiffany, had two daughters, Yuri and then Amber. The two new borns were blessed with powers that even the king and queen didn't have. Yuri was blessed with the powers of water and Amber was blessed with the powers of fire. They were to be the most strongest heirs in vampire history. There was a person that trained them to harness ther powers and that person was the famous vampire warrior, Yunho. Yunho was a human that was bitten by the king. So Yunho had no choice but the become his faithful servant.

Yunho trained them at a young age, and they both got the hang of there powers faster than what he thought, so he didn't need to teach them anything else. But on that red night, the vampire hunters came and started to attack and slaughter every vamipre there. They cut off there heads and burned them, they even made bombs that contained holy water. They king and queen didn't want their children's life to be so short since they were brought into the world, so they gave Yunho a command, to take them into the the human world so that they could have a life to live there own.

Yunho obeyed and fled to the human world before the hunters came to the palace and killed the king and queen. When Yunho found a place to settle in at L.A., he erased the children's memories so that they could live a normal live among the humans. He cared for the kids like they were his own, but it also broke his heart that they knew nothing of there parents so he promised that he would tell them when the time was right.

After 16 years later, Yuri and Amber were know in high school doing what human do, but there was on hunter who survived the attack from 16 years ago, and came searching and found Yunho and attacked him. When the girls came back after school, the found Yunho on the ground straining for breathe. He knew that he didn't have enough time so in the short amount of time, he gave them the memories of when they were little so that they could take care of each other and maybe change the world, but when he died he didn't think that the girls would do that but instead they wanted revenge on the person who did this. So they moved to Korea and decided to live there. But they what they didn't know was that they weren't the only ones that lost there family.