Professor X thought he'd solved the problem of Magneto, but the mutant master of magnetism has regained his memory and his mission! Now the X-Men are on the run, with the Ultimates hot on their trail! Can the X-Men stop Magneto before he executes his plan to enslave the human race?
Collects Ultimate X-Men #26-33, Ultimate War #1-4.
— Description from Comic Vine community (comicvine.gamespot.com).
