After discovering a U-boat in a Delaware swamp containing a map to Napoleon's "lost cellar," the Fargo brothers race to find the treasure before a rival collector can.

To pull off their latest mission, Cabrillo and the crew of the Oregon must survive a devastating new weapon unleashed in thirteenth-century China ... a daring rescue in the snowbound mountains along the Afghanistan-Pakistan border ... a woman gone missing in the jungles of northern Thailand and Myanmar ... for Cabrillo and company, all of these events will come together -- leading to the greatest threat against US security that the country has ever...

When a NUMA research vessel is suddenly destroyed by a malevolent black substance originally mistaken for an oil spill, Kurt Austin and Joe Zavala pursue an investigation in the Indian Ocean, where they discover a plot targeting millions of victims.

After an undersea lab conducting research on a rare jellyfish known as the blue medusa mysteriously disappears and a bathysphere harboring Joe Zavala is attacked by an underwater vehicle and left helpless on the sea floor, Kurt Austin puts the NUMA team on the case.