Breaking into the Mutant Control Agency's headquarters to destroy the registration files on mutants, the X-Men lose two of their members against the Sentinels, but eventually gain another.

As the Beast faces an arraignment in court before a mutant-hating public, the X-Men unwillingly take in an old enemy of Wolverine's. Magneto, an old friend turned enemy of Professor Xavier's, attacks a military base in an attempt to unite mutants against humanity.