A global war begins in 1940. This war drags out over many decades until most of the people still alive (mostly those born after the war started) do not even know who started it or why. Nothing is being manufactured at all any more and society has broken down into primative localized communities. In 1966 a great plague wipes out most of what people are left but small numbers still survive. One day a strange aircraft lands at one of these communities and its pilot tells of an organisation which is rebuilding civilization and slowly moving across the world re-civilizing these groups of survivors.