When an explosive event shatters the lives of the X-Men and takes away their mentor, the beaten heroes walk away from it all. But then they are given a rare glimpse into the future, and see the world in utter ruin, ruled by giant destructive robots; a world that spiralled out of control because the X-Men had given up. Wolverine, the most legendary of all X-Men, reunites the broken heroes to prevent the world's destruction. Wolverine contacts future Xavier to ask if he knows anything about Master Mold, something he had seen at the Trask Lab. Xavier has not even started his investigation when the giant Sentinels find his hiding place in the rubble of the old X-Mansion. They take him and the entire Cerebro Chamber to their facility. In the prisoners' yard, there are many other mutants being held powerless by inhibitor collars. Xavier uses his mind control powers to keep the cybernetic Colonel Moss from activating his collar. The other mutants are impressed and have heard about him from Wolverine, who trained them as his X-Men. Xavier asks for their help to get back the Cerebro, explaining its power to locate and track mutants all over the world. Without it he cannot communicate with Wolverine in the past, who is their only hope if they are to stop the war before it starts. They sneak into the facility and find that the Sentinels are using the captive mutants to mechanically reproduce their powers under the direction of Master Mold. They are evolving! A major battle ensues between the future X-Men and Sentinels.