This is a last of 3 movies about 3 friends (the other two are "Kortik" and "Bronzovaya Ptitsa"). The gang has grown up and in this movie they discover and help to stop criminal activity on the factory and in their neighborhood.

A graduate of the village school Pyotr Gorokhov from the village of Dyadkovo comes to Moscow to enter a prestigious economic university; he succeeds, albeit literally by a miracle. However, Petya was always helped out by chance and mysticism. Compared to other students (mostly Muscovites and residents of other big cities), this guy from the province stands out sharply — both in manners, in reprimand, and in behavior. Accustomed to defend their principles to the end of Gorokhov was called Balamut (Troublemaker). Nevertheless, in the student community, he quickly mastered and became a leader. Everything would be fine, but he has two problems — unrequited love for the dark-skinned beauty from Cuba and English...