In the 1960s, superpowered humans Charles Xavier and Erik Lensherr work together to find others like them, but Erik's vengeful pursuit of an ambitious mutant who ruined his life causes a schism to divide them.
In a world where mutants (evolved super-powered humans) exist and are discriminated against, two groups form for an inevitable clash: the supremacist Brotherhood, and the pacifist X-Men.
The human government develops a cure for mutations, and Jean Grey becomes a darker uncontrollable persona called the Phoenix who allies with Magneto, causing escalation into an all-out battle for the X-Men.
The early years of James Logan, featuring his rivalry with his brother Victor Creed, his service in the special forces team Weapon X, and his experimentation into the metal-lined mutant Wolverine.