Spring 1988. It's hot time at the post office in the city of Borisov - an influx of parcels. Suddenly there is an explosion. Panic, two people were injured. A nineteen-year-old girl, who had her first working day, died on the spot. During the investigation, the assumption of a terrorist attack is supplanted by a version of card debt. Soon it is she who comes to the fore. But it seems that the card cheater himself is shocked that they tried to kill him...