Before Charles Xavier and Erik Lensherr took the names Professor X and Magneto, they were two young men discovering their powers for the first time. Before they were arch-enemies, they were closest of friends, working together with other mutants (some familiar, some new), to stop the greatest threat the world has ever known.
Hobbs has Dominic and Brian reassemble their crew to take down a team of mercenaries; Dominic unexpectedly gets sidetracked with facing his presumed deceased girlfriend, Letty.