Olga, who was taken to the West by Hitler's invaders, works as a switchman at a railway station. Echelons with prisoners of war - convicts - pass by her every day. Olga gets acquainted with the machinist Fyodor and with his help organizes the escape of her camp mates. But the plan fails, and the escapees are shot. Fyodor, who miraculously survived, gets to the homeland. And after the war, chance again brings him together with Olga, when the hero with severe burns after an accident falls into the hospital...

From childhood, Sanya Grigoryev was able to achieve success in any business. He grew up a courageous and brave man. The dream of finding the remnants of Captain Tatarinov’s expedition led him to the ranks of polar explorers. The life of Captain Grigoryev is full of heroic events: he flew over the Arctic, fought against the Nazis. He was in danger, had to endure temporary defeats, but the hero’s persistent and purposeful character helps him to keep his vow made to himself in childhood: “Fight and seek, find and not give up.”

New teacher arrives to the remote village Krinitsy and not everybody are happy about what he's doing.

A traveling musician falls in love with a princess who is betrothed to a dictator planning to defeat his enemies with the help of an exploding mutant mosquito.