Malga is the moon of Megalos, and is commonly used by the native megalosaurus to test weapons, as it was believed to be uninhabited. However, a volcanic spaceship of a hostile species of volcano-men took off from the moon and attacked Megalos, destroying several large cities and decimating the planet's civilian population. However, the survivors fought back and defeated the invaders at the planet's north pole. Before freezing, the crew of the ship managed to wake their comrades on Astro Prime, including their king, Inferniak. The megalosaurus, eager to stifle the danger, sent two scientists, Tarq and Korlius, to solve the problem.