The U.S.S. Thomas Jefferson is one of the most powerful warships in the world. A nuclear-powered Nimitz-class aircraft carrier, it is believed to be impregnable. But when the Thomas Jefferson suddenly disappears at sea, the Pentagon is stunned. There was no warning. No apparent attack. And no survivors. All signs point to a nuclear accident. But subsequent reports suggest that a rogue submarine, armed with nuclear warheads, may be on the loose. Where did it come from? How could it get within striking distance of the Thomas Jefferson? Worse yet, where is it now? The deadly chase begins.