Telluria is set in the future, when a devastating holy war between Europe and Islam has succeeded in returning the world to the torpor and disorganization of the Middle Ages. Europe, China, and Russia have all broken up. The people of the world now live in an array of little nations that are like puzzle pieces, each cultivating its own ideology or identity, a neo-feudal world of fads and feuds, in which no one power dominates. What does, however, travel everywhere is the appetite for the special substance tellurium. A spike of tellurium, driven into the brain by an expert hand, offers a transforming experience of bliss; incorrectly administered, it means death.