This is the Earth in the 30th century.  A world of science and technology.  A world of peace and light.  Preserving this peace is the Legion of Super-Heroes, a group of young adventurers who are the best and brightest of their kind.  But a darkness is approaching their world.  A centuries-old evil threatens to destroy their entire universe.  Herein lies the story of the Legion's greatest challenge, complete in one volume.