Deep-sea recovery team Odyssey Marine Exploration sets sail to locate and excavate three shipwrecks worth a billion dollars, all in one summer. The crew recovers the first of who-knows-how -many silver ingots on what they believe to be the SS GAIRSOPPA.
The Odyssey crew heads back to the SS GAISOPPA to recover more silver ingots, but a sudden storm forces a change of plan. They reroute to their second target for the summer: the SS MANTOLA, a wreck reported to hold 660,000 ounces of silver.
With their summer season ending, Odyssey Marine doubles down. One team finds grisly remains on naval legend HMS VICTORY while the other races to recover the motherlode of silver ingots still onboard SS GAIRSOPPA before bad weather shuts them down.