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.

An inconspicuous, modest accountant, Sulin often finds himself in half-funny, half-sad situations - he is often timid, afraid to cross at least someone. Until one day an incident helped him remember that he, too, was once decisive and brave.

Former soldier returns to his village only to discover that his girlfriend married another man.

Watching happy families, Katya made a simple conclusion for herself: the further away from home her husband is, the more prosperity and happiness there is in the house. And the young wife sends her husband to a distant construction site...