Following the road through the Mohaine Desert, Roland continues his epic search for the elusive Man in Black. Instead, he finds Tull, the last stop of civilization. A town of devil grass, desert sand, and despair...full of nothing, especially mercy. It may seem Tull is on the very edge of the world, with little past the horizon but a steep fall to oblivion. But Roland believes otherwise... that beyond the limits of Tull lies a hidden truth that means everything to the fate of Mid-World. The Man in Black holds the key to that mystery, and Roland is going to keep following him, even through a deadly trap set here in this town, to unlock it.