Arinka lives with her father on a remote section of the railroad tracks. His father, a lineman, went to the office to take a route master's test, but he answered the questions incorrectly. According to him, the culprit of his failure is the train conductor who was sitting next to the examiner. Back home, he bitterly told his daughter that they were retired and had to move to town. During her absence, the train conductor who was in love with her came to Arinka every day. In this young man, Stepan Stepanovich, to his surprise, recognized the "culprit" of yesterday.
