In 1940 the world is plunged into a seemingly perpetual war. A devastating air raid practically destroys Everytown, reducing its previously grand buildings to rubble. Almost 30 years later, over half the remaining population is wiped out by the chilling Wandering Sickness. Victims are shot on sight as a bewildered humanity struggles to survive in a barbarous wasteland. In 1970 a futuristic flying machine brings a saviour to the remnants of Everytown. John Cabel (Raymond Massey) represents the visionary brotherhood Wings Over the World. Cabel faces opposition from local warlord the Boss (Ralph Richardson) but he and his colleagues pledge to create a utopia from the ashes of the old world. Nothing, it seems, will be allowed to get in their way