Treasure hunters Sam and Remi Fargo are shocked to discover a bottle of a rare wine taken from Napoleon's lost cellar. However, someone else is also searching for this treasure.

While returning from a mission on the Congo River Juan Cabrillo and the crew of the covert combat ship Oregon intercept a mayday from a defenseless boat under fire off the African coast. They save Sloane MacIntyre, who's looking for a long-submerged ship that may hold a fortune in diamonds. But what surprises Cabrillo is her story about a crazy fisherman who claims to have been attacked on the open sea by giant metal snakes in the same area.