The first years of Soviet power in East Siberia. Malyshev ,deputy chief of Criminal Investigation Department, a Komsomol member, wins over to the Soviet power a former field-hand and now a bandit Lazar Baukin, and the latter tells him about Vorontsov, the gang leader. Malyshev guarantees Baukin’s freedom. However the chief arrests him in order to reap laurels of catching the gang leader. Malyshev is in despair - he has brought under execution the man who has fully trusted him. The situation gets worse due to his personal drama and Malyshev commits suicide.