In the year 2076 AD, the world collapsed once due to "World War III." Humanity, having sprouted life again from the brink of destruction and achieved reconstruction, lives in the ultra-high-tech futuristic city of "Orbit." While the city appeared to have regained peace, behind the scenes, those who abused "Holsters"—supernatural abilities transcending science—and giant criminal organizations ruling the lower sectors were rampant. The public safety organization "Alpha" was established to protect the peace of the people. As three races with their own ideologies intersect amidst the light and shadow of the city, a battle for the fate of Orbit begins—.