The X-Men face their most formidable and powerful foe when one of their own, Jean Grey, starts to spiral out of control. During a rescue mission in outer space, Jean is nearly killed when she's hit by a mysterious cosmic force. Once she returns home, this force not only makes her infinitely more powerful, but far more unstable. The X-Men must now band together to save her soul and battle aliens that want to use Grey's new abilities to rule the galaxy.
The discovery of a cure for mutations leads to a turning point for Mutants . They may now choose to give up their powers and become fully human or retain their uniqueness and remain isolated. War looms between the followers of Charles Xavier who preaches tolerance, and those of Magneto who advocates survival of the fittest.
