Rogue seeks a scientist who claims to be able to "cure" any mutant of their powers, unaware that neither he, nor his process, are what they appear to be.

An ancient and immensely powerful mutant, known as Apocalypse, creates four Horsemen to help usher in a new world where survival of the fittest reigns.

Bishop returns from the future to again attempt to fix his world, this time trying to stop a plague from infecting mutants. But his noble actions lead to a far greater tragedy.

To stablize his own timeline, Cable comes to the present to prevent Bishop from saving mutant-kind from Apocalypse's plague.

Fueled on by his desire to seek vengeance against the immortal mutant that changed him into a weapon of evil, Archangel persaudes Rogue into helping him hunt down and destroy Apocalypse.

Apocalypse steals Cable's computer in the year 3999, allowing him to time travel to the past, where he schemes to bring an end to his struggle against inferior mutants once and for all. This leads to Bishop becoming trapped amid the timestream, and brings

When Oracle, the psychic member of the Imperial Guard is kidnapped by Apocalypse, Professor Xavier deduces his scheme involves capturing mutants with telepathic abilities. The X-Men are split up to track them down before the villains can, which puts Wolverine & Shard in the middle of a scuffle between Archangel and a ninja named Psylocke.

After swiping the government's own time machine, Cable ends up recruiting the X-Men on his mission to destroy Apocalypse's source of immortality at its creation.

Two of Apocalypse's former evil allies, the captive Wolverine, the loose cannon Cable, and the exiled Bishop, come together to free the kidnapped psychics and save reality from being rewritten.