Friends Travelling on Sea

May 1945. Soviet tanks arrive in Prague through the streets of Vyšehrad. One of the young tank drivers talks to the mother of little Vašek and proudly shows her a photograph of himself with his own son whom he has not seen for three years. Shots are fired and the tank driver returns to his post. Vašek is left holding the photograph. Eleven years pass, Vašek is now thirteen and he wants to return the photograph. He plans to win a pioneer competition - the prize for the winner is a trip to Odessa where, according to the stamp on the photograph, the unknown tank driver comes from. The disappointed Vašek only comes second and he asks the winner, Alena Hrušková, to return the photograph for him. Along with the winners from Moravia and Slovakia, Petr and Laco, she is placed with a tourist group. Alena is hoping that she will get help from Marina, a girl from Odessa, with whom she has only been corresponding until now. Marina does find help. The photograph is to be printed in the regional paper. Alena also receives assistance from war veterans from the military sanatorium. She discovers that the tank driver, Nikitin, died in Prague. The young sailor Kostya, the tank driver's son, has the same photograph; he finds out his real name and, after all these years, meets his mother again who had thought him dead. The pioneer's efforts thus have a happy ending.