In the vast universe, humanity's understanding of dimensions is still very limited. Beyond the dimensions known to humankind, other higher-dimensional worlds exist. In the material dimension, the dark dimension faction seeks to seize more dimensional space to expand its territory, while the light dimension protects the other dimensions and fights against them. On their final battlefield, Earth, the light dimension reduced itself and the dark dimension to a flat plane. The dimensional spirits of both factions remained on Earth. Only a few humans possess the power to unseal dimensions can transform these dimensional spirits back into three-dimensional forms. They are known as "Dimensional Generals."