The setting is the year 2XXX. Humanity has established a "gradual world government." Everything is entrusted to the international AI network Sapiëntia, and people live according to its rational decisions... However, the "Moon Colonization Project" promoted by Sapiëntia has created a disparity between Earth, which maintains peace by sending pollutants and criminals to the Moon, and the impoverished lives of those on the Moon. This divide is slowly turning into the spark for an impending civil war.
One day, the protagonist, Jack, is caught in a bombing terrorist attack and loses his family to the rebel forces on the Moon, who were plotting to free themselves from Earth's control. Vowing revenge, Jack decides to join the Earth military as an investigation soldier and, with his comrades, sets out toward the Moon...