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As Thousands of foreign ships arrive in New York Harbor for Fleet Week, beneath the surface of the Hudson River a rogue armada of Chinese attack submarines is taking position, poised to launch a blitzkrieg attack on an unsuspecting populace.Tugboat captain Ken Hughes knows New York Harbor as few other navigators do. Now, in the midst of chaos and terror -- on a familiar waterway that has suddenly turned hostile and deadly -- he finds himself on the front lines of the battle to free a hostage Manhattan.Time is running out for a city under siege as Hughes, a beautiful, gutsy sailing enthusiast, and a courageous handful of desperate citizens race to save the metropolis and the nation.