A mysterious wreck is discovered off the coast of Italy at 120 meters deep. For Lorenzo del Veneziano, an underwater marine archeologist, it is an amazing sight. The submarine is intact and stands almost vertically at the bottom of the sea. What is the story of this ship? Why did it sink in these waters?
Based on archive footage and interviews with historians and members of the U-455 crew, the film will retrace the incredible story of the German warship that fought every marine battle against the Allies, from the Baltic Sea to the Atlantic and then finally the Mediterranean where it now rests.