Treasure-hunting husband-and-wife team Sam and Remi Fargo are exploring the Great Pocomoke Swamp in Maryland when they are shocked to discover a World War II German U-boat. Inside, they find a bottle taken from Napoleon's famous "Lost Cellar," and fascinated, they set out to find the rest of the collection. But another connoisseur of sorts is hunting his own prize, and the Lost Cellar is his key to finding it.