The team is separated when Jean and the Professor are drawn Professor X's formidable mental powers are neutralized. With the team fractured, and Xavier powerless, it seems impossible that the X-Men will be able to best this super powered mutant, who turns out to be more familiar than first thought.
The X-Men are celebrating Iceman's 18th birthday at their favorite coffee hangout when they are attacked by street thugs, Professor X tries a dangerous experiment to cure is step-brother from the magic of the Crimson Gem of Cyttorak with disastrous results.
While the Angel, Beast and Iceman battle the newly reawakened Juggernaut in the physical world the rest of the team, with Dr. Strange, travel into the Crimson Cosmos to find a mystical gem that could stop their foe. But is it too late to save their mentor, Professor X?