Novels about real heroes of their era—the employees of the Soviet militia, people for whom a service feat is an everyday matter. 1975. At the Yaroslavsky Station, a train scheduled to depart is being prepared; a mail car with valuable international parcels has been attached to it. The cargo is escorted by four postal employees, among them a newcomer—Lenka Sedykh. Unexpectedly, demobilized soldiers approach the crew boss and ask to be taken as passengers: they’ve spent all their money and can’t buy tickets. The crew boss agrees to help the demobilized men… At the next station, the police are urgently called to the train. The arriving officers saw something that struck them with its cruelty: the mail car has been looted, and the postal workers have been slaughtered. Severely wounded, Lenka managed to pass on a strange message to the investigator—this became the only lead in this bloody case… It happened quite recently. When honor and total devotion to a dangerous profession were the main and mandatory qualities of Soviet militiamen…