During the Second World War, two young experts captains, an American destroyer and a German ship captain, who go in a fight in the Atlantic Ocean, when they have a deep fight, as each one expects the next step of the other, the thing that challenges both of them.
While recognizing that it's not any sort of great piece of acting by Robert Mitchum or a searing portrait of war, if one accepts The Enemy Below as an action-filled war movie, it's thoroughly entertaining stuff.
This WWII drama, centering on the suspenseful warfare between rival sumarine officers, German (Curt Jurgens) and American (Robert Mitchum, deservedly won the Special Effects Oscar.