Planet Earth is under attack and the human race is threatened by the Gurzons, annihilistic aliens. Earth's Defense Force must get through to the planet Prism. They are the archenemy of the Gurzons and would help to destroy their nemesis. The EDF must get the A/X – 101 from them, the most powerful, miracle weapon to stop the destruction by the Gurzons and save the world. You'll fly starfighters through space, trying to get through to Prism.