This story follows Yohan, a young man who has been terribly wronged by the governing authority in his nation; the Auran Military. He joins the resistance group "Corona", along with his two companions Mayumi and Xander, and they set out to show the inhabitants of Aura how corrupt the military is as they suspect that they're responsible for turning innocent people into monsters of darkness known as "Umbral". What they end up discovering is far darker than anything they expected.