Mankind has established a perfect utopia due to the miniaturization of plasma fusion reactors and the development of AI technology. As a result of learning and developing on their own, mankind had created an optimal environment, a world that has no conflict, and famine has arrived.

Unexplained and sudden rise in temperature leads to sea level overload and diastrophism brought the critical situation to mankind. However, thanks to the excellent performance of A.Is, mankind was living their normal lives without the sense of crisis.

But as the giant meteor scaped along with the earth, the plasma facility exploded causing the ecosystem to collapse leading to a resource supply deficiency. Thus, a group of scientists called the Frontier commenced the Earth Purification Project to preserve humanity, and the survivors were dispersed into the earth’s shelter and cosmic orbital arc.

As time flew by the earth's resources were lacking making the Frontier decide to stop all supplies to the Orbital Arc. They commence an experiment to give the last hope to humanity…

1086 years later, a person called ‘Age’ falls to earth from the Universe.