Commander Elias Thorne has spent his life trusting discipline, steel, and orders. Then the Pacific answers his sonar with something that should not exist-and the woman pulled from its depths begins dismantling everything he believes about duty, desire, and the world beneath the waves.
Aboard the naval vessel Vanguard, Elias is accustomed to controlling danger. Lyra is different. Enigmatic, predatory, and bound to forces older than the surface world, she awakens instincts Elias has spent years suppressing. The closer he gets to her, the harder it becomes to separate fascination from devotion-and military obligation from betrayal.
As the Vanguard descends farther into forbidden waters, its crew faces secrets, divided loyalties, and supernatural forces that refuse to remain hidden. Elias must decide what he is willing to sacrifice when protecting Lyra means abandoning the rules that once defined him.
Their connection could become their greatest strength-or deliver them both into an abyss from which neither can return unchanged.
A haunting paranormal fantasy for readers drawn to dangerous attraction, morally conflicted heroes, forbidden connection, military tension, and supernatural worlds hidden beneath the sea.