The film tells the story of a small group of the Korean People's Army, led by Hakcheol Lee, deputy chief of the reconnaissance division, which went behind enemy lines.

Based on the story of the same name by Han Sorya, which tells one of the pages of the life of South Korean youth - her struggle against external interference and for the unification of the peoples of South and North Korea.

The film tells the story of a newlywed couple working on the railroad (the husband is a train driver and his young wife works at a lathe) in a lyrical and poignant tone. Both have difficult personalities and their own views on life, but together they take an active part in the economic recovery of the country after the Korean War.