《卡拉之狼》在整个系列中是部承上启下之作，它记录了罗兰的卡-泰特聚齐后在中世界的首次协同作战。
罗兰、埃蒂、苏珊娜、杰克和会说话的貉獭奥伊继续他们追寻黑暗塔的旅程，一行人来到一个奇特的小山村——卡拉。这个村子盛产双胞胎，可是每隔二十年，狼群就会从暗处奔袭该村，每一户有双胞胎的人家都会被掠走一个孩子。几个星期后，身心遭受重创的孩子会被送回来，并无一例外地变成了痴呆儿。罗兰和他的卡-泰特决定留下来帮助村民对付狼群。
与此同时，在一九七七年的纽约，也就是杰克曾经所在的世界，书店的主人凯文•塔尔正被一群歹徒胁迫，歹徒们要求塔尔出让位于曼哈顿中心的一块空地，在这片空地上生长着一枝具有非同寻常意义的玫瑰。罗兰必须制定出一个可以同时对付两个世界里的邪恶势力的计划，而坐在轮椅上的苏珊娜却在此时出现了一些诡异的变化……
Roland and his tet have just returned to the path of the Beam when they discover that they are being followed by a group of inexperienced trackers. The trackers are from the town of Calla Bryn Sturgis, and they desperately need the help of gunslingers. Once every generation, a band of masked riders known as the Wolves gallop out of the dark land of Thunderclap to steal one half of all the twins born in the Callas. When the children are returned, they are roont, or mentally and physically ruined. In less than a month, the Wolves will raid again. In exchange for Roland’s aid, Father Callahan—a priest originally from our world—offers to give Roland a powerful but evil seeing sphere, a sinister globe called Black Thirteen which he has hidden below the floorboards of his church. Not only must Roland and his tet discover a way to defeat the invincible Wolves, but they must also return to New York so that they can save our world’s incarnation of the Dark Tower from the machinations of the evil Sombra Corporation.
