 Soviet followup to several Hollywood aviation films of the 1930s.3 Russian test pilots risk their lives making a round-the-world, non-stop flight on "Pobeda-1" ["Victory-1"]. Their experimental craft loses radio contact and is alleged by Japanese ( "fascist") radio to have crashed fatally. But hero Klim s mother and brother Sasha never give up hope, and Sasha launches a desperate air search, hoping to find the missing "Pobeda  without loss of life.....