X-Men: ApocalypseSave

The film opens with a flashback to 3600 BC Egypt. En Sabah Nur — the world's first mutant, capable of transferring his consciousness into a new mutant body to absorb their abilities — is preparing his fifth body transition in a sealed pyramid chamber. His four chief acolytes attempt to assassinate him during the transition, sealing him beneath the collapsing pyramid. He is preserved in deep stasis for thousands of years. Cut to 1983, where Egyptologist Moira MacTaggert (returning from First Class) discovers the buried pyramid's hidden lower chamber and accidentally triggers Apocalypse's revival. He emerges into the modern world powerful, ancient, and convinced that contemporary civilization is hopelessly weak. He intends to wipe humanity out and rebuild society around enhanced mutants under his rule.

On a separate track, Erik Lehnsherr has been hiding in Poland under an assumed name with a wife and young daughter. Local authorities discover his identity after he uses his powers to save a colleague at a steel mill. The local police arrive at his house with the goal of arresting him. The confrontation goes catastrophically wrong: Erik's wife and daughter are killed in the chaos. Erik's grief detonates into an enormous magnetic discharge that levels his village. Apocalypse, sensing the disturbance, recruits him as one of his Four Horsemen. The other three are Storm (a young thief from Cairo), Psylocke (a former Hellfire Club assassin), and Angel (an aging gladiator-fighter rescued from a German cage circuit). Apocalypse enhances each of their powers significantly through bodily contact.

At the Xavier School for the Gifted in Westchester, Charles Xavier has rebuilt the institution and is teaching a new generation of young mutants — including a young Cyclops (Scott Summers, who has just discovered his eye-beam powers and has been sent to the school by his parents) and his older brother Havok. Jean Grey has also been a student for years and is struggling with nightmares she does not yet understand are visions of her future Phoenix Force destiny. Hank McCoy is teaching at the school. CIA agent Moira MacTaggert visits Charles to share what she has learned about Apocalypse. The two have not spoken since their relationship in First Class; Charles had erased her memory of him at the end of that film, and his reintroduction is bittersweet.

Apocalypse's plan accelerates. He uses his amplified Cerebro-style consciousness to reach every nuclear-armed nation simultaneously and demand they launch their entire arsenals into orbit, harmlessly. The world's nuclear powers comply, fearing his apparent omniscience. With the world disarmed of its primary weapons, Apocalypse plans to use a globally-broadcast amplified telepathic message — channeled through Charles's mind — to wipe humanity from the face of the Earth and establish a new mutant-only civilization. He kidnaps Charles and uses Erik's magnetism to begin a planet-spanning destruction sequence, with Erik systematically pulling the metal substructure from the world's major cities and cycling it back into the Earth's crust as part of Apocalypse's reshaping ritual.

Quicksilver returns to find his mother — having recently learned that Erik Lehnsherr is his biological father. He arrives at the school just as Apocalypse's forces capture Charles. He helps a hastily-assembled team of young mutants (Cyclops, Jean, Nightcrawler, Quicksilver, and the briefly-allied Mystique) infiltrate the school grounds during a William Stryker raid that has captured Mystique, Hank, and the older students for testing. The Quicksilver mansion-rescue sequence — paralleling but expanding on his Days of Future Past kitchen sequence — became one of the film's most celebrated set-pieces. He runs through the burning building extracting students one at a time, set to Eurythmics' "Sweet Dreams."

The young X-Men team travels to Apocalypse's command center in Cairo. The final battle takes place across the destabilized Egyptian landscape. Cyclops, Jean, Quicksilver, Mystique, Nightcrawler, and Beast face Apocalypse and his Four Horsemen. Erik, in the middle of the battle, sees footage of Apocalypse's intent and remembers his lost wife and daughter. He breaks his alliance with Apocalypse. The Storm character, witnessing Erik's defection and Cyclops's bravery, also defects to the X-Men's side. Psylocke, less ideologically committed than her companions, sees the writing on the wall and disappears into the chaos. Angel is killed in the resulting fight.

The climactic confrontation comes down to Charles Xavier's mental battle with Apocalypse on a psychic plane. Apocalypse threatens to overwhelm Charles's mind. Jean Grey, sensing Charles's distress, unlocks her dormant Phoenix Force for the first time. The Phoenix energy flares around her in massive cosmic patterns. Cyclops's optic blasts and Storm's lightning combine with Jean's Phoenix energy to obliterate Apocalypse's protective armor. Apocalypse, sensing his end approaching, lashes out telepathically at the entire team. Jean delivers the finishing blow — disintegrating his molecular structure with raw Phoenix-force energy. The school's Cerebro is destroyed. The world's nuclear weapons remain in orbit. Apocalypse is dead.

The film's epilogue restores the X-Mansion. Hank McCoy's school reopens with new students. Cyclops, Jean, Storm, Nightcrawler, and Quicksilver assemble in the mansion's basement training facility — donning the recognizable yellow-and-blue X-Men uniforms for the first time. Erik, having lost everything, departs to mourn alone. The U.S. government quietly retrieves the orbiting nuclear weapons and restores the strategic-deterrent balance. The post-credits scene shows Stryker's organization recovering blood samples from Logan during a Weapon X-related raid that pre-dates the film, with the labeled samples filed in a vault marked "Essex Corp." — setting up Mr. Sinister as a future antagonist (a thread that was never developed).

X-Men: Apocalypse grossed $544 million globally on a $178 million budget — a financial success but a critical disappointment compared to the universally praised Days of Future Past. Reviewers cited Oscar Isaac's Apocalypse character as underdeveloped beneath heavy makeup, the film's overstuffed roster of new and returning characters, and a third act that felt rushed and CGI-dominant. The Quicksilver mansion-rescue sequence was the most universally praised element. The film closed Bryan Singer's tenure as a major X-Men director (subsequent X-Men films would be helmed by Simon Kinberg with Dark Phoenix and by Josh Boone with The New Mutants), and its mixed reception accelerated Fox's eventual decision to sell the X-Men rights back to Disney. The franchise's full revival under Marvel Studios was announced years later when Disney completed the Fox acquisition in 2019.