Investigating the disappearance of a secret Romulan fleet, the <I>U.S.S. Titan,</I> commanded by Captain William Riker, is unexpectedly propelled more than 200,000 light-years into the Small Magellanic Cloud. One of the Milky Way's satellite galaxies, the Cloud is also home to the Neyel, the long-sundered offshoots of Terran humanity, with whom the Federation has had no contact in over eighty years. <P> Nearby, Riker's uncertain ally, Commander Donatra of the Romulan Warbird <I>Valdore,</I> rescues a young Neyel, the survivor of a mysterious cosmic upheaval that seems at times to be both unraveling and reweaving the very fabric of space...the fulfillment of an apocalyptic vision that has already claimed millions of lives. <I>Titan's</I> science team soon finds evidence that the ravaging of Neyel space is the work of a vast and powerful intelligence: the stirrings of a dormant consciousness that is maintaining the existence of the Small Magellanic Cloud -- and all life within it -- from one moment to the next. And if it should awaken, the consequences are unimaginable. <P> As Riker considers his options, his new crew struggles with the scientific and philosophical implications of what they've discovered...while the young Neyel in their midst forges a bond with the captain, conjuring old ghosts Riker has yet to lay to rest.