A signal from the abyss. A mission that should never have begun. Three miles beneath the ocean, the submersible Virgil descends to investigate a long-abandoned Soviet prison-sub lost to a Cold War disaster. Commander Ed Westwing and his crew expect a rescue operation?routine, controlled, survivable. Instead, they find nothing. No heat. No breath. No life. Only a silent, unnatural pulse. As they dock with the wreck, systems begin to fail, and shadows stir where nothing should exist. What they uncover is far more terrifying than a disaster site?the prison was never built to hold people. It was built to contain something.And now, it?s awake. Some things are buried for a reason?and some should never be found.