In Spring 1944 the Allied invasion in Europe was just a matter of time, the German intelligence was desperate to find a source that would give them informations about time and place where the landing forces will attack.
When nuclear submarine sinks after collision with unknown object the crew of civilian mining platform is approach to help in the rescue mission at the bottom of the ocean.
During Battle of Stalingrad young Russian solder proves to be skilled sniper. Soon his fame will bring the German expert to the city and the cat-and-mouse game will begin.
A brilliant mathematician, John Nash, receives an offer to work with the secret services in tracking messages encrypted in the newspapers. His task absorbs him so completely that he does not even notice his deteriorating health.
Veteran submarine captain of Soviet Navy is sent to his last mission aboard an old boat that he used to serve on. During this mission a secret device will be tested, but that is not the only unusual thing about this patrol.
