Set in a distant future, the Moon and Mars have become dumping grounds for Earth's toxic waste and refuges for criminals. The moon’s criminal settlers launch an armed rebellion, threatening their Earthbound captors. For Takashi Katori, however, this turmoil matters little; he simply enjoys playing computer games with his American friend Olivia Lawrence. Their favorite game is a fighting robot simulator where Takashi’s unbeatable Laserion mecha dominates the field. When a scientific experiment unexpectedly materializes the Laserion into reality, Takashi learns he must pilot the robot to defend Earth from the invading space criminals.