The USS Neptune, a nuclear submarine, is sunk off the coast of Connecticut after a collision with a Norwegian cargo ship. The Navy must attempt a potentially dangerous rescue in the hope of saving the lives of the crew. A detailed look into the claustrophobic and terrifying world of a German U-boat crew hunting ships from undersea. Gritty, realistic, and peppered with black humour, this is one of the few sympathetic portrayals of the war from the German side to be released in western distribution. Based on the Best Selling novel by Tom Clancy this film tells the story of Captain Marko Ramius, the skipper of the Soviet Union's newest nuclear sub.
Tensions run high undersea, when the launch message is received, followed by an incomplete followup.