1941. Georgy Volkov, Captain of the State Security Service, is delivering to the Soviet Union a consignment of emeralds under a trade agreement between the USSR and Germany.

The film begins in the "monkey" district police Department of Moscow, where the detainee is delivered type of 60 years in a Bathrobe and Slippers. This homeless-looking character claims that he is Maxim Averin, who starred in the series "Glukhar" in the role of Sergei Glukharev. Who is this old man, and will the police find the real Maxim Averin? How and why are Denis Rozhkov, aka Antoshin, and Alexander Bobrov, aka Agapov, on the stage?

The hostel number 3, in which the heroes lived, is being demolished, and three guys (Michael, Anton and Kuzya) are relocated to a new hostel. In the new building they are settled in block number 510 with the girls Christina, Yana and Masha. Kuzya begins to date Masha, and Anton dates Christina. Later Kuzya leaves for Agapovka, the botanist Valentin is settled instead.

The hostel number 3, in which the heroes lived, is being demolished, and three guys (Michael, Anton and Kuzya) are relocated to a new hostel. In the new building they are settled in block number 510 with the girls Christina, Yana and Masha. Kuzya begins to date Masha, and Anton dates Christina. Later Kuzya leaves for Agapovka, the botanist Valentin is settled instead.

A mystery around a search for a lost skull of Nikolay Gogol.