Young Magneto: Imprisoned for murder, Erik Lensherr is freed from prison in 1973 so that his magnetic powers might prevent another murder, one that would have grave repercussions for the future of mutantkind.

Mystique: In 1973, Raven Darkholme plans to kill Bolivar Trask for crimes against mutantkind. But doing so will lead to a dark future, and she will have to go through her old firends Erik and Charles to do it.