The X-Men rescue Jubilee when giant robots assault a shopping and have hopes of capturing the young mutant.

The X-Men break into the Mutant Registration Office to obliterate their records, but Beast is seized while attempting to escape.

As the X-Men struggle to expose a sinister plot to register and exterminate all mutants, they find themselves battling the most menacing mutant of all time - Magneto.

While professor Xavier attempts to stop Magneto's reign of destruction; Sabretooth infiltrates X-Men headquarters.

Cyclops and Jean are captured by a band of underground-dwelling mutants; the X-Men try to rescue them as Wolverine confronts his feelings for Jean.

When Wolverine leaves the team and seeks solitude in the Arctic, he is followed by Sabretooth, who threatens a local tribe.