Polina Belenkaya

The series is set in the Russian Empire during the second half of the 19th century, against the backdrop of social upheaval and the Russo-Turkish War. At the heart of the story is the romance between Sofya, a student at the Institute for Noble Young Ladies, and the married Count Vorontsov.

A large family gather to celebrate a birthday. It would seem like a great reason to get together. But the family is just a project of one of the "brothers" — an experienced psychologist who is conducting an experiment to create a "happiness formula". He believes that manipulating others, their emotions and desires, will make them happy. However, love interferes with the mathematical calculations, which can neither be calculated nor predicted.