En Sabah Nur, a powerful mutant believed to be the first of his kind, rules ancient Egypt until he is betrayed by his worshippers, who entomb him alive. His four lieutenants die preserving him. Awakening in 1983, after accidental interference from CIA agent Moira MacTaggert, he believes humanity has lost its way without his presence. Aiming to destroy the world and remake it, he recruits Cairo pickpocket Ororo Munroe, who can control weather, and enhances her power.
In East Berlin, shape-shifting mutant Raven investigates an underground fight club and discovers mutant champion Angel, who possesses a pair of large feathered wings on his back, and Kurt Wagner, who can teleport. Raven rescues Kurt and employs the services of black marketeer Caliban to transport them to America. En Sabah Nur later arrives and recruits Caliban’s enforcer, Psylocke, who leads him to Angel. En Sabah Nur enhances both their powers, transforming Angel’s wings into metal wings.
Alex Summers discovers that his younger brother, Scott, is manifesting his mutation for shooting optic beams. Alex takes Scott to Professor Charles Xavier’s educational institute in Westchester County, New York in hopes that Xavier and Hank McCoy will teach him how to control his abilities. Scott meets the telepathic and telekinetic Jean Grey, and the two develop an attraction. Raven brings Kurt to the institute. Apocalypse’s powers cause disturbances around the world, leading Xavier and Alex to consult with Moira, who has been researching the legend of Nur.
In Communist Poland, the metal-controlling mutant Erik Lehnsherr lives with his wife, who is aware of his past, and their young daughter, Nina. He accidentally exposes himself when he uses his powers to save a coworker almost crushed in the metalworking factory they work in, prompting militia to come capture him. When it becomes apparent Nina is a mutant too after her desperation and fear at her father being taken away prompts a nearby flock of large birds to attack the militia, they unintentionally kill Erik’s family in the scuffle, and he retaliates by murdering them all with a locket he gave his daughter containing pictures of his parents long before they were taken to Auschwitz. En Sabah Nur later approaches the disheartened Erik and takes him to the aforementioned concentration camp, where Erik’s power first manifested. His power enhanced, Erik destroys the entire facility and joins him.
En Sabah Nur enters Xavier’s mind while Xavier is using the mutant-locating computer Cerebro and, co-opting Xavier’s powers, forces all global superpowers to launch Earth’s entire nuclear arsenal into space to prevent interference. He and his new lieutenants arrive at the mansion and kidnap Xavier. Attempting to stop them, Alex accidentally causes an explosion that destroys the mansion. Peter Maximoff — having learned that he is Erik’s son, and hoping that Xavier can help to find him — arrives in time to use his super-speed to evacuate the students just before the explosion destroys the building, but Alex is presumed dead. Colonel William Stryker’s forces subsequently capture Hank, Raven, Peter, and Moira, and take them to a military facility for interrogation. Scott, Jean and Kurt covertly follow and liberate their comrades using Stryker’s mind-controlled and brainwashed experiment, Weapon X, whose memories Jean partially restores.
At En Sabah Nur’s behest, Erik uses his powers to control Earth’s magnetic poles, causing widespread destruction across the planet and mass casualties. En Sabah Nur plans to transfer his consciousness into Xavier’s body and use Xavier’s power to enslave the minds of every person on earth. Xavier secretly sends a telepathic distress call to Jean, and the others travel to Cairo to battle Apocalypse and his horsemen. They rescue Xavier, but the sheer strain of the process on him because of his constant resistance causes him to lose his hair as the process nears completion. Angel is defeated and incapacitated in the battle. Erik and Ororo are convinced to turn on En Sabah Nur and, with Scott’s help, they keep him occupied physically while Xavier fights him telepathically in the astral plane. Finally, Xavier encourages Jean to unleash the Phoenix, the full extent of her powers, incinerating En Sabah Nur in the process, while Psylocke flees in the ensuing chaos.
After the battle is over, Xavier and Moira rekindle their relationship, while Erik and Jean help reconstruct the school, but Erik refuses Xavier’s offer to stay and help teach. Peter decides not to tell Erik that he is Erik’s son yet. As the new X-Men, Hank and Raven train new recruits Scott, Jean, Ororo, Kurt, and Peter.
In a post-credits scene, men in suits visit the Weapon X facility to retrieve data on Stryker’s mutant research, including an X-ray and a blood sample marked “Weapon X”, on behalf of the Essex Corporation.
Release date: May 27, 2016
Directed by: Bryan Singer