In the Morlock tunnels beneath New York City, the X-Men face a new generation of outcast mutants, the vengeful Gene Nation. Then it's off to Hong Kong, where the merry mutants are immersed in eastern mysticism in the "Quest for the Crimson Dawn". In the farthest reaches of outer space, the X-Men must protect themselves from both the Imperialistic Shi'Ar and the mechanical parasites the Phalanx.
Finally the children of the Atom find themselves in an Antarctic stronghold where one of their own is forced to stand trials for his sins against all mutantkind.