MURA operative Konstantin Troshin returns from the front after the victory in the Great Patriotic War and finds out that he no longer works in the police. The reason is a conflict with an influential general of the NKGB of the USSR. But Troshin cannot imagine his life without the police. He manages to get a job as a precinct officer in the most disadvantaged area of Moscow — Maryina Grove.

The year is 1949. Former front-line soldier and former investigator Sergei Gastev departs from investigative activities, faced with an unexpected problem of official mutual assistance. Attempts to restore justice almost end up in prison for himself. Gastev decides to limit his activities to teaching Roman law at the university of a small regional town. In Sergei's personal life, too, everything is not easy: the affair with the city Komsomol leader Lyudmila Mishina has to be carefully hidden...

During World War II the Red Army sends a special unit named "Zvezda" ("The Star") on a mission to conduct Guerilla warfare against the Germans in the Soviet Union.