In the middle of the 22th century World War III began between the Allied Power and the Pact Power. Atomic weaponry was long abandoned, and neither side could gain the upper hand. However, twenty years later the Pact Power has constructed a deadly battle satellite on the Moon, aptly named "Disastrous Disaster". Fearing that the war will be lost if the satellite attacks their bases on the Earth, the Allied sends an Illieus fighter craft, navigated by the young pilot Unebi Kagurazaka, to counter the threat.