Many years ago in the village of Kamyanytsya there was the largest ski jump, which attracted numerous tourists, which brought profit to local residents. But the years did not spare this sports facility, and the number of tourists was decreasing. But even in this difficult time, two rogues of the owners of a small hotel are trying to survive as best they can, even if for this it is necessary to rob the unlucky guests.
Talented mathematician Anna Nikolaevna Shvabrina works as a school teacher. By the will of fate, she begins to help Captain Vershinin investigate complex crimes using mathematical methods. The main tools of the investigator are many years of experience and the basics of forensic science, Anna Nikolaevna is an impeccable knowledge of mathematical methods, formulas and models. It would seem that they are completely different, but it is thanks to this union that it will be possible to investigate the most difficult cases.
