As Cyclops struggles to create a safe haven formutants on Utopia, Magneto suddenly arrives...and offers to join the X-Men! And to prove that he comes in peace, the Master of Magnetism undertakes a painful feat that might save another lost X-Man's life...or might just kill him. Then, after the events of Second Coming, the mutant race has Hope again - literally! Witness the stunning emergence of a new generation of heroes! Plus: things between Kitty Pryde, Emma Frost and Sebastian Shaw come to a head! And why are the X-Men all getting sick at once? The Sublime are back, and they've unleashed a contagion on Utopia. Can the mutants fight a microscopic foe, or will this be their final battleground? Matt Fraction's blockbuster X-Men run concludes!