Trapped in the 5th Dimension, the evil tyrant, Bosc the Terrible plots his revenge against the universe, starting with the citizens of the Planet Earth. Escaping through a dimensional gateway, Bosc sets up an outpost on the planet Uranus, right on the border of Earth's expanding empire. His intention? Total extermination of all Earthlings!!

Our only hope for survival rests on the very broad shoulders of Blasto, space explorer, weapon freak and all-around alien eradicator. He's just what the world needs: a universal patriot who wants nothing more than to rid the universe of slimy green aliens. Uranus is on the line and Blasto's here to save it!