This is a series. Set in the X-Men universe.
X-Men: First Class is set primarily in 1962 during the Cuban Missile Crisis, and focuses on the relationship between Charles Xavier and Erik Lehnsherr / Magneto, and the origin of their groups—the X-Men and the Brotherhood of Mutants, respectively—as they deal with the Hellfire Club led by Sebastian Shaw, a mutant supremacist bent on starting a nuclear war.