John Farson's army has crushed the city of Gilead, and the seat of power for the Gunslingers who've maintained law and order since the time of Arthur Eld. Now, the last handful of Gunslingers are led by their dinh Roland Deschain away from the smoldering ruin.

But Farson serves the design of the malevolent Crimson King. And that fey entity has greater designs than the fall of any kingdom of men. The destruction of Gilead has damaged one of the techno-mystic Beams that bind together not just this world, but all worlds. In order to put everything right, Roland's quest leads him to his destiny... The Dark Tower.