The film is based on the short story by Anton Chekhov. Gentlemen invited to tea by the local landowner, a retired major-General von Rebbeca.. Lieutenant ryabovich lost in the darkness, in the rooms of the old house, suddenly kissed a stranger.
The telefilm follows the fun adventures of two average students, Vovka and Valerka, who, while searching for an underground river, realize that their efforts won't succeed without knowledge.