National Geographic follows a band of adventurers as they search for the treasure from the S.S. Republic, sunk by a hurricane after the Civil War.  

The S.S. Republic was a double side-paddle steamship sunk by a hurricane en route from New York to New Orleans after the Civil War. On board were 30 crew and 20 passengers, and some special cargo: nearly $400,000 in gold and silver coin. All the crew and passengers made it safely off the vessel, although a number died before they could be rescued. The gold and silver horde went down with the ship. Today, the value of those rare coins may exceed $150 million - making it one of the the richest treasure ever discovered at sea. National Geographic follows a band of adventurers from Odyssey Marine Exploration as they search for the treasure that could have helped prevent the New Orleans economy from grinding to halt during the currency-starved Reconstruction period.