The Commissioner of Police has been tasked with conducting an investigation into the threat of a terrorist attack in the building of the press concern. During the investigation, he learns about the existence of the 31st department, created by the management of the concern with the aim of eliminating the opposition press.
The story of six-year-old Bobka, a kind and cheerful man who lives in Leningrad and desperately dreams of unexpectedly visiting his dad, who serves in the distant Caucasus Mountains. This is his most cherished dream, and it will certainly come true, but only after some adventures that are quite normal for this tomboy.