A long time ago, people from the Misui Stars visited the Earth and gave birth to a species more suitable for the growth of the Earth-human beings. However, due to the collapse of the earth's core tunnel, species were isolated at both ends of the surface and the center of the earth. The species on the surface formed today's people, while the species left in the inner earth world evolved under the radiation of the earth's core gem and formed the Ilite people.
An exploration by Dr. Mary accidentally discovered the Ilite people and the lost culture of Mithui. Subsequently, the birth of Thor, a hybrid of humans and Ilites, opened the continuation of the future cooperation and competition between the two races...