After a wild party at Rainbow Day Care, Dolores announces that it's time for a nap. The Power Rockers don't want to follow her rules. Then Baby Marciano shows up and invites them to Planet Me, a planet without rules, where everything is possible.
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.