Cyclops, still in mourning after Jean Grey's ''passing'', quits the X-men and returns to his orphanage home and encounters his friend Sarah. She tells him that a wealthy man has decided to adopt all the mutant children, especially Rusty, but his intentions are to make them his army to destroy all humans in the world so that mutants are accepted. It's up to Cyclops to stop him and save the mutant children. Later, Cyclops returns to the mansion and he and the other X-men discover that Jean Grey hasn't died after all.
They are mutants, genetically gifted human beings - the world's newest and most persecuted minority group. Amidst an increasing climate of fear and bigotry, one enlightened individual, Professor Charles Xavier, has created a safe haven for some of these powerful outcasts. The mutants here are taught to harness their unique abilities for the betterment of the human race. They fight against hostile Government agencies and mutant supremacist Magneto, and his factions, which seek to destroy the human race.
X-Men: The Animated Series - No Mutant Is An Island Synopsis and Schedule