As Magneto's Acolytes amp up their attacks on Homo sapiens everywhere, the X-teams join forces to put an end to their mad crusade against humanity once and for all. And as a mysterious disease begins creeping through the mutant community, claiming the lives of hated foe and dear friend alike, which X-Man will buckle under the strain? Matters come to a head in the most shocking way possible, culminating in a shocking attack on Wolverine - and a showdown between Professor X and Magneto that must be seen to be believed.