Dirk Pitt, death-defying adventurer and deep-sea expert, is out to the ultimate test as he plunges into the perilous waters of the Pacific Vortex, a fog-shrouded sea zone where dozens of ships have vanished without a trace.

The latest victim is the awesome superb Starbuck, America's deep-diving nuclear arsenal. Its loss poses an unthinkable threat to national defense. Pitt's job is to find it and salvage it before the sea explodes. In a furious race against time, Pitt's mission swirls him into a battle with underwater assassins and traps him in the arms of Summer Moran, the most stunningly exotic and dangerous, toward disaster, onto an ancient sunken island.

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