The land below is dark and twisted. Creatures of nightmare roam freely, preventing anyone with sense from adventuring too far beyond the bio-sphere’s anchorings. Those who seek the thrill of the surface soon find it punishing. Very few ever return from the surface anymore.
Civilization, if you can call it that, persists in the alloy spheres thrust into the stratosphere by yards-thick rods of titanium alloy. The rods house graphene spirals, the storage center for power in each sphere. Solar cells cover the upper and lower halves of each city-pod. During the scheduled day, the cells allow sunlight to filter into the central levels of the city. At night, the transparent cells grab and enhance the sparkle of the stars we still can’t reach.
There is war brewing among the detritus of mankind. Food is becoming scarce. Although our ancestors installed hydroponics labs alongside industrial farms in the upper- and lower-most levels of each city, those farms are failing. In some cities, the general assemblies have been overthrown, leaving chaos in their wake. The central government has lost control. Many of the outlying spheres are being taken, but information is sporadic and unreliable. Communications are suddenly cut off, the cities falling dark one by one.
For those of us who want to live, our only hope may be to descend from our floating fortresses, to struggle for life among the ruins of our lost ancestors.