In a world of super-heroes another hero falls out of the sky one day and lands almost virtually at the feet of the greatest hero on this Earth. When it is realized this displaced hero (Superion) is almost a duplicate of the first (Solarian), the two come to understand that Superion has been snatched from his own dimension and mysteriously placed within this one. For what purpose? That's what the duplicate heroes determine to discover, if they can survive the greatest danger to this version of Earth and the onslaught of a trio of villains whose powers have been enhanced to the point where they may well kill these heroes before their quest can be completed and Superion returned to his own world. ( )