Captain Kirk and the crew of the U.S.S. Enterprise NCC-1701 are faced with their most challenging mission yet—rescuing renowned scientist Zefram Cochrane from captors who want to use his skills to conquer the galaxy. Meanwhile, ninety-nine years in the future on the U.S.S. Enterprise NCC-1701-D, Picard must rescue an important and mysterious person whose safety is vital to the survival of the Federation. As the two crews struggle to fulfill their missions, destiny draws them closer together until past and future merge—and the fate of each of the two legendary starships rests in the hands of the other vessel...

    Spock's mother, Amanda Grayson, is dying, and Spock returns to the planet Vulcan where he and Sarek enjoy a rare moment of rapprochement. But just as his wife's illness grows worse, duty calls Sarek away—once again sowing seeds of conflict between father and son. Yet soon, Sarek and Spock must put aside their differences and work together to foil a far-reaching plot to destroy the Federation—a plot that Sarek has seen in the making for nearly his entire career. The epic story will take the crew of the U.S.S. Enterprise™ to the heart of the Klingon Empire, where Captain Kirk's last surviving relative has become a pawn in a battle to divide the Federation... and conquer it. With Sarek's help, the crew of the Starship Enterprise™ learns that all is not as it seems. Before they can prevent the Federation's destruction, they must see the face of their hidden enemy—an enemy more insidious and more dangerous than any they have faced before...

    Captain Picard travels back and forth among his past, present, and future as he and the crew of the Enterprise fight to prevent the destruction of the human race.