It is Fleet Week in New York, when foreign ships fill the great city's harbor in an incomparable display of naval grace and power. Ken Hughes and Kate Ross are only two of the millions joining in the celebration, watching the spectacle from aboard Ken's boat. Newly in love, they—like everyone else—are oblivious to the dangerous interlopers moving silently among the welcomed guests. Beneath the surface of the Hudson River, an armada of Chinese attack submarines is readying to launch a blitzkrieg attack on the unprepared and unsuspecting populace. It is a brazen act of aggression, the brainchild of brilliant and obsessed Admiral Tang Li. And it seems predestined to succeed because of one terrifying America's most vital and important city is virtually impossible to defend. But in this gotham of strong wills and stubborn pride, there are those who won't be cowed. Ken Hughes knows New York harbor as few other navigators do. Now, in the midst of chaos and terror, he must elude a fearsome enemy by expertly maneuvering a familiar waterway that has suddenly turned hostile and deadly. His allies are few, but equally the ambitious, independent Kate Ross, whose sailing skills and new love will be tested to the extreme; and the besieged city's megalomaniacal mayor, who sees the invasion as a personal affront. Together they find themselves on the front lines of the battle to free a hostage Manhattan. But urban grit alone cannot defeat an unstoppable army, as a courageous handful of desperate citizens races against time to prevent an explosive destiny that could paralyze their nation and reduce their island city to rubble.It is Fleet Week in New York, when foreign ships fill the great city's harbor in an incomparable display of naval grace and power. Ken Hughes and Kate Ross are only two of the millions joining in the celebration, watching the spectacle from aboard Ken's boat. Newly in love, they—-like everyone else—-are oblivious to the dangerous interlopers moving silently among the welcomed guests.