Jean Grey has never truly understood the depths and complexity of her mutant ability or a potential that exceeds even that of her mentor and friend Charles Xavier. But after a mission to stop a cosmic disaster nearly kills her, she returns home transformed, the experience unleashing her colossal power in ways she can’t comprehend or contain. With Jean spiraling out of control, she slowly transforms into her alter ego, the supernatural force known as Dark Phoenix, and begins to unravel the very fabric that holds the X-Men together. Now, as the X-Men prepare for an alien invasion that could wipe out life on Earth, they must also contend with a deadly threat from within their own family.