Former naval officer John J. Gobbell brings to life marine warfare as few others ever have. Now, the author of When Duty Whispers Low, A Code For Tomorrow, and The Last Lieutenant, returns to the fiery panorama of World War II, as Commander Todd Ingram is caught in a living hell.

In 1944, the Allies have delivered a stunning blow to Hitler's Western front. In the Pacific, Admiral Raymond A. Spruance's Fifth fleet is poised to eviscerate the Japanese Navy—and begin a new war for the occupied islands. But in the center of this world-spanning drama, a lone Japanese submarine is on a mission of a very different kind. And on board is Todd Ingram, a prisoner of war and captive of fate.

Navy brass knows Ingram is on the sub, but can't reveal its ability to break Japanese code. So Ingram's friend, Captain Jerry Landa, is put in charge of a covert “Neptune Strategy” to save Ingram. But Landa can't help himself as he falls for Ingram's wife Helen while the top brass demands to know where the Japanese sub is going, who is in command—and what its astounding ultimate mission really is...