Mafia kidnaps an investigator's little son after he discovers massive thefts on a local shoe factory. With the help of his three old friends, two cops and a newspaper reporter he struggles to rescue his son and close the case at the same time.

A female commissar is sent to the naval detachment, led by the anarchist Vozhak, on behalf of the Party Central Committee. She is tasked with subordinating the sailors to the cause of the revolution.