When a salvage operation turns deadly, John McCready discovers the most dangerous predators are not in the water.

After his brother dies salvaging gold from the wreck of a U-boat, deep in the North Sea, McCready is compelled to find those responsible and bring them to justice.

Armed with cutting-edge diving tech and a team of elite specialists, McCready must outwit a ruthless enemy who will stop at nothing to silence him.

But powerful men guard their secrets with lethal force.

With unexpected twists and heart-pounding turns, this action-packed thriller will have you holding your breath until the very last page.