A kids from "Armiya Tryasoguzki" are fighting "whites" again.

The action takes place in one of the major port cities of the North. Young welder Mark Talalin and foreman Ilya Besedin cannot find the true reasons for their disagreements and conflicts.

Sea elements are fraught with many secrets. No crew is safe from emergencies that may occur at sea when they enter the open sea. The film tells a story that happened with the crew of an old tugboat "Dolphin". The ship fell into a terrible storm and, unable to overcome weather conditions, stood on stones. The crew led by the captain promptly leaves the ship, only the engineer Samokhin remains on the ship.

Captain Jack, this is actually an ordinary girl, she is an informal leader among the boys, loves the sea very much and spends a lot of time on the decommissioned ship Signal. The film tells the amazing story of the Signal team, which during the war saved the lives of Soviet prisoners of war, among whom were Gunar and Mitya.

Year 1947... Yegor Trubnikov is giving all his powers to make life in his own Kolhoz better.