The film tells about the service of submariners in the Northern Fleet, as well as how nuclear strategic missile carriers are preparing for the next sea voyage.

The film is dedicated to military doctors. Viewers will see how doctors are trained and trained at the military medical academy, as well as learn about the complex operations that doctors perform not only on the battlefield, but also in hospitals. The filmmakers tried to show the difference between a military doctor and a civilian one, and to tell about how the representatives of this difficult profession work.

The film tells about the activities of the Black Sea Fleet, in particular about diesel-electric submarines. The film shows the daily service of submariners.