After WWII, a Soviet pilot returns to civilian life and struggles in her roles as school principal and mother, and with her memories of the war.
At one court hearing, a witness, who is engaged in prostitution, refused to take the oath, cause she didn't consider herself as a Christian. That incident caused great excitement in the hall.
The series is about the operation code-named "Trest", which under the leadership of F.E.Dzerzhinsky was carried out by the VChK to identify and eliminate the counter-revolutionary and monarchist underground on the territory of the USSR, associated with foreign white-emigrant organizations.
