A new world! A new beginning!
Welcome to the Age of Apocalypse. Unus and his Infinites soldiers kill humans but are approached by Bishop. The X-Men arrive and Unus is defeated by Iceman. Bishop blames Magneto for the atrocity they are living the "Age of Apocalypse". Magneto prepares the ultimate strategy against Apocalypse forces. The incredible beginning of the most earthshattering story arc in X-Men history!
— Description from Comic Vine community (comicvine.gamespot.com).
