The world is divided into two types of people: those on the "inside" of Eden, and those on the "outside." The "inside" Eden features clean air, clean water, and a high quality of life, living up to its name as a true paradise, but this Eden could not accommodate everyone in the world. Those who could not enter the paradise of the inner Eden had to remain outside the "inside" Eden. The conditions in the "outside" Eden are the complete opposite of those in the "inside" Eden—here the land is arid, and the people suffer from poverty caused by the "inside" Eden. As a result, many resistance groups have formed. Ricalna Forde is a soldier in the resistance group Cosmos, whose mission is to infiltrate Eden's main headquarters and destroy the "Central CPU" that controls all of Eden.