The film takes place during one day of operation of a railway line, the capacity of which is lower than necessary. A disaster occurs: a passenger train crashes into a tank train, the driver's assistant is killed, and traffic on the section is delayed. The film explores the patterns that led to the accident.
Four friends - Aziz, Dima, Rano and Rustam are relaxing in a pioneer camp. One day they see the guys from the village with old cartridges found in a cave. Friends decide to reveal the secret of the cartridges...
