Soviet propaganda film. The first years of the VChK formation. Nurse Yunna Ruzhich and poet Lafar, who became Chekists, take an active part in uncovering a counter-revolutionary conspiracy in Moscow in 1918.

Prosecutor's office investigator Vershinin is leading two cases - the murder of a notorious scoundrel and speculator, as well as the search for the author of anonymous denunciations against plant director Kuleshov, who is opposing those who, while shouting about perestroika, defend their own benefit.