2219 AD: Space Travel has been a reality for 100 years. The human race expanded into space until Earth eventually controlled a Star Federation of 20 space colonies, stretching all the way to Orion. To maintain control over the Earth's ever-expanding territories, the colonies were kept under strict martial law. However, the colonies mutinied against Earth's control: they took control of the planet Secilia, the most important of the colonies, where they established the Secilia Federation and began their fight for freedom. Following a succession of sweeping victories, the Federation finally defeated Earth's forces.

24 hours after Earth's surrender, directly after all the inhabitants had been transferred to the colonies, the Secilia Federation announced its intention to destroy the planet completely. It has forcibly suppressed all opposition from the colonies and has despatched a special force to carry out the annihilation of the Earth.

However, Earth's Balca Division foresaw this eventuality and is now in the process of developing the 'R-GRAY', based on technology salvaged from the Secilia starsystem. The 'R-GRAY', a craft made up of parts from 13 different Secilia ships, is the only craft able to carry out 'OPERATION RAYSTORM' - the Balca Division's desperate mission to combat the Secilia Federation...