There are three major races in the world: humans, second-generation humans, and vampires. The second generation of humans evolved for humans. They have wings that humans do not have and super combat power, but when they fold their wings, they look the same as humans. The second generation of humans and vampires have been fighting for control of humans all year round, and the war finally ended with the victory of the second generation of humans. The second generation of humans established a new holy empire and became its rulers. The vampire lives in a corner, but is very ambitious. Human beings, who have been oppressed for a long time, finally began to fight for freedom.