A mysterious snow blankets the Earth. Wherever it falls, communications are disrupted; machinery fails; electricity dies. Careful examination of the snow by the Institute of Science reveals that the snow” is really composed of billions upon billions of microscopic animals that feed upon energy, clearly unlike any animals on Earth as we know it. How to fight them? Guns turn to rust! Aircraft, their batteries dead, lie grounded! Even Astro Boy, seemingly an invincible robot, finds all his energy drained by the incessant blizzard from outer space. Is this the end of the world? Here is an unusual adventure in which not Astro Boy, but the human Dr. EIefun saves the day when robots that are his own invention re-awaken the good Doctor’s conscience and fire anew his will to live!