You have to be very intelligent to convincingly look foolish. Stepanida Kozlova realized that too late.
Larisa Mikhailova, a customer of the online cosmetics store of the company "Bak," died after using their face mask. Her husband, Nikolay, suspects the cosmetics warehouse worker, Margarita, of having added poison to the mask package. Margarita’s husband asks Stepa to find out where Nikolay gets such thoughts from. It can’t be! Kozlova begins an investigation and learns a lot of interesting things. For example, that Nikolay used to court Margarita, but was rejected. And that Larisa’s death is far from the only incident in this case…