A disgraced FSB colonel, a businessman and an Afghan sniper found themselves drawn into a common dangerous adventure. Their goal is treasure hidden in the hold of a sunken submarine. Their enemy is the mafia, following on their trail. Their weapons are courage and ingenuity, which allow them to continue their work even at the gunpoint of bandits. But none of the treasure hunters know what they are about to discover in the caches of the “golden shark” that sank near the Canary archipelago during the Second World War... Previously, the book was published under the title “The Canary Option”