The Secret of the Black Hand [Тайна Чёрной руки]

1954. The restless dreamer Mishka has almost realized his dream of starring in a spy movie. A new adventure awaits him: he and his mother have a long journey across the country to reunite with the boy's father, a pilot. On the train, Mishka discovers a real spy and decides to prevent him from committing an insidious villainy by all means.