A young man from Earth enlists in the army to attack rebels on the Moon, only to find that his former best friend has become his enemy.

Year TS 2XXX AD. Humanity has formed a "relaxed world government." Everything was entrusted to the international AI network Sapientia, and people lived according to their rational judgment... However, Sapientia's "moon reclamation project" created a schism between the Earth which maintains peace by sending pollutants and criminals to the moon and the moon, which is forced to live in poverty, becoming a source of fire for the War of Independence.