In 'Captive Hearts, ' the X-Men learn the startling secret of the solitary, subterranean-dwelling Morlocks. Wolverine, most volatile of mutants, is despondent over his feelings for Jean Grey as she and Scott Summers grow closer. Wolverine seeks solitude and peace among a distant eskimo tribe - until the deadly Sabretooth intrudes. In 'Slave Island, ' a prison paradise called Genosha is the setting for a tragic tale of the ultimate enslavement. Cable is the X-Men's only hope as he infiltrates this mutant concentration camp and battles alongside those yearning to be free.