The series is set in a post-apocalyptic near-future in which the Earth exists in a state of near-perpetual darkness. Civilization has largely become confined to domed cities in which the populace exists in a state of drug-addled stupor in order to while away time between birth and death. The rulers of Solar City, the most populated of humanity's remaining bastions, enlist a Bedouin drifter, named simply Omar, to lead a team into the wilds outside of the city in search of the savior they believe may exist somewhere in the sparsely populated wilds.