Some wrecks are graves. This one is a prison.
When a cutting-edge submersible is discovered adrift in the North Atlantic, U.S. Coast Guard Commander Freya Keating is tasked with a routine recovery. It should be simple, but what she doesn't expect is a deadly mystery.
The vessel is intact. No damage. No distress call. But its entire crew has vanished.
The sub was exploring the wreck of the SS Celestine, a World War II passenger liner lost under suspicious circumstances and long shrouded in dark rumors. Official records call it a maritime tragedy. But deep inside its shattered hull lies something the Nazis were willing to kill to possess.
And it was never meant to be found.
As Freya takes command of the investigation, the mission spirals fast. Crew members lash out without warning. Critical systems fail. Fear spreads through the ship, turning trained professionals into violent threats.
With a storm closing in and her crew fracturing around her, Freya must descend into the wreck herself to stop whatever was sealed inside before it escapes the deep... and reaches the world above.