When Doc is taken captive by a band of marauders in what was once Nebraska, Ryan and the companions rally to get him back. But they aren't just fighting the local muties. They're also up against the area's terrifying terrain, which shifts and morphs at a moment's notice. With their options dwindling in this mazelike region that doesn't obey the laws of physics, the team joins forces with a beautiful and deadly woman who evens the odds on the battlefield....