A veteran of the brutal naval battles of World War I, the German submarine UB-107 was discovered on the floor of the North Sea in 1985. An important find itself, it harbored a surprise that would force experts to re-examine the records of the epic conflict. Join John Chatterton and the DEEP SEA DETECTIVES as they descend 100 feet into cold and murky waters to explore this remarkable site. Entwined in the remains of the submarine is the wreck of the British steamship Malvina, which was supposedly sunk a week after the UB-107, and thirty miles away! Historians and divers help piece together the clues left behind by these ghosts of World War I.