The end of the world has come. After defeating the likes of Magneto, Mister Sinister, and Stryfe, the X-Men and X-Force have returned home expecting some well-deserved rest. Instead, what they found is worse than anything they could have imagined: Professor X is dead, the world is in ruins, and a ruthless tyrant rules over what remains of humanity with an iron fist. Brace yourselves, heroes, for the Age of Apocalypse has arrived!