Dave McClure arrives in Bar Harbor, Maine, for some rest and relaxation before returning to a world he left behind years ago. The CIA wants him back. But he is unaware of the danger he'll face in the days ahead as he discovers the secrets that lie in the deep ocean trenches of the Atlantic. Deadly secrets. McClure is unexpectedly thrust into the middle of a treacherous Russian plot and a harbor town's lethal intrigue, each as perilous as they are startling, and struggles to make sense of all the jumbled pieces in this deadly puzzle. As the CIA and the U.S. Navy race against time and the Russian threat, the powerful pull of emotion will test the limits of Dave McClure's skill, strength, and courage.