Among the usual cases, talking with drunkards, a junior cop finds time for the neighbor girl Alla, who fell under the influence of the leader of the thieves' gang. Seeing her with a young man, suspected of theft, he tries to detain him.

Olga Nikolayevna kills her little son Kolya and then herself. Andrey, the most laid-back and friendly cop in Russia, gets on the case.

1977 film by Eldar Ryazanov