The returning soldier Kuzma Kadkin on the train tells how well he lived before the war, and that everyone in the area knows him. An accidental fellow traveler, a young mother, leaves her child, a one and a half year old boy, Kadkin, to run away at the junction for water, but lags behind the train. Kuzma has no choice but to bring the baby home...
The driver Karpukhin came under investigation because of a tragic accident, as a result of which a person died. The young investigator, believing Karpukhin, undertook to defend the defendant, but at some point yielded to someone else's opinion, after which the accused had to prove his innocence himself...