After the events of Dark Phoenix, Jean Grey left Earth in order to make sure she didn't hurt anyone but after years of being alone in the vast void of space she has given in to the Phoenix Force and has returned to Earth to spread it's corruption. Throughout the movie Jean tries to break out of the Phoenix's hold but is stuck in her own head. Eventually the Phoenix gathers the attention of the new X-Men including members like Mimic, Warpath, Multiple Man, Sunspot, Kitty Pryde, Iceman, and Nightcrawler. This team of X-Men try their best to stop Jean but fail multiple times. Eventually Jean starts fading as the Phoenix consumes her being. Iceman tries to talk to Jean but just then Jean crushes Iceman's skeleton from the inside killing him. Jean creates a cocoon-like orb and traps herself in it as corruption spreads all over New York.
