In the year 2488 A.D., alien invaders from distant space known as the Aldebarans tried to conqueror the Earth by using their advanced weaponry and other technology. Their main method of invasion is to convert small planetoids into space fortresses/bomb. Each fortress was equipped with an armada of ships to defend the base while it prepared to smash into its target. The Aldebarans were also equipped with ray guns, holographic projectors, and language translators. They did not succeed in invading the Earth.