Professor Charles Xavier's X-Men--the aggressive Wolverine, conflicted Beast and newly returned Kitty Pryde, led by Cyclops and Emma Frost--find themselves confronted with Dr. Kavita Rao, who has developed a controversial "mutant cure." Now they're up against science, prejudice and a mysterious new foe named Ord! Can the X-Men protect the world's mutants against this powerful new alien menace and the "cure" that threatens to rid them of their unique abilities forever?