Ten years after the Apocalypse, because of repeated exposure to radiation, a new generation of mutants appears. Among them is the charming Jean Gray, a young woman who begins to manifest unprecedented powers. Seduced and corrupted by the tremendous power it possesses, Jean turns into Dark Phoenix, becoming a feared foe. Facing the new sequence of events, X-Men will have to decide whether the life of a single team member is more important than that of people around the world.