Known to the world at large as outlaws, they are the X-Men.
Gathered by Charles Xavier, Earth's most powerful mutant telepath, these incredible individuals undertake an adventure that will span the expanse of the cosmos. One of their own, Jean Grey, has unwittingly attained power beyond conception - and been corrupted absolutely.
Now the X-Men must decide:
Is the life of the woman they cherish worth the existence of an entire universe?