After the U.S. warship Eagle 56 exploded off the coast of Maine in April 1945, some of its surviving crewmembers claimed they were attacked by a Nazi U-boat. But an official Navy inquiry dismissed their account, blaming it on a boiler explosion. Because of that report, none of the crew or families received a Purple Heart. Now, a team of investigators has found a new piece of physical evidence--the bow of the sunken ship. In order to prove the official history is wrong and that 49 sailors died in combat, they need to find the rest of the ship.