Just as Maca's career reaches an inflection point, the enigmatic ex who broke her heart reappears in Madrid and she turns to her friends for support.

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.