Barents Sea, 1942. After a German attack, HMS Edinburgh sinks into the icy depths with over five tons of Russian gold aboard, leaving boy seaman Mike Cox as one of the survivors.
Forty years later, after a successful career in the Special Boat Squadron and then as a top commercial diver, Cox is obsessed with the dream of raising the treasure from its watery grave. His own plans thwarted, he is blackmailed by a greedy American arms dealer into infiltrating an intergovernmental operation to salvage the gold.
Caught in a deadly trap, his only hope may be the men of his old unit: the legendary SBS.