Following the critical events that took place in Wolves of the Calla, the gunslinger Susannah Dean is now haunted. Her body has been possessed by the demonic mother Mia and has been transported to the strange world of New York City in the year 1999.

Something is growing inside Susannah, something terrible… soon she will give birth to Mia’s “child.” However, three unpredictable allies—the young Jake, the stuttering Oy, and the fallen priest Donald Callahan—are following her, hoping to prevent the unthinkable. Meanwhile, the gunslinger Roland of Gilead and Eddie Dean have ended up, violently, in another place and time—in the state of Maine in the year 1977—where the author of a bestselling novel with mysterious connections to the Dark Tower is about to meet his destiny…