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.
During the Cold War in the 1960s the U.S.A.F. and NASA tested the experimental rocket-powered aircraft X-15 that set altitude and speed records and reached the edge of outer space.
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.
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.
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.