During World War II, Gato class, and its successor, the Balao class, carried much of the burden of the submarine war in the Pacific Ocean. These new fleet submarines were successful boats that proved to be fast, strong, well armed, and prepared to the long-range patrols necessary to fight in the Pacific.
It is 1942 and the German submarine fleet is heavily engaged in the Battle of the Atlantic to harass and destroy English shipping. With better escorts of the Destroyer Class, German U-Boats have begun to take heavy losses. 'Das Boot' is the story of one such U-Boat and its crew.