The Terran Fleet is developing a new prototype starfighter, the RaptorX, and the player is a test pilot of that prototype. Suddenly, a space crime organization fleet known as the Alien Shogunate Xidus Armada, a threat to Earth and the Terran Fleet (ever since Galactix), has delivered an all-out surprise attack to the Terran Fleet that catches them with their guard down, destroying most of the Raptor fighters in the process, but the few RaptorX prototypes that were away being tested have survived. Now it is up to the player to battle through the Xidus Armada, destroy their ultimate weapon, codenamed the DemonStar, and liberate Earth from its crimes.