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