From outside the universe comes a terrifying threat. A colossal spaceship materializes in the void, crewed by master scientists who have only one aim: the total destruction of the Earthly universe which, to them, is but a molecule in their macrocosm. But the invaders have reckoned without the intervention of the Cosmic Crusaders-the Golden Amazon, Abna, Viona and Mexone-who pit their strength and scientific ingenuity against Lixom, the leader of the invaders-a duel with Colossus. But it seems to be a duel that the Crusaders must lose when, separated from their mighty spaceship, the Ultra, they are projected by Lixom thousands of years into the past, to materialize-completely unprotected-in the deadly vacuum of outer space!