The educational center for gifted children shook with horror: in an instant, the educational institution lost two employees - the director of the center, Alexander Vorobyov, and the psychologist Kira Mozheiko were killed. The detectives established that Alexander and Kira were lovers. Who could benefit from their death? Perhaps the true target of the criminals was not Vorobyov at all, but Kira, without whose recommendation not a single child could enter school.

Amina Tong, a student of the Faculty of Higher Mathematics and Cybernetics at Moscow State University, who came to study from Ulan-Ude, was found dead. All information from her computer disappeared without a trace. In the course of the investigation, it turns out that the girl, together with her classmate Yura, developed a program to predict the results of races on the races, and together with another student she played in a casino using her own system for calculating the probability of winning. The fact that, shortly before the death of Amina, Yuri sold the program to a certain Kirill, a daring gambler who attracts talented students to work on hacking and adjusting the list of results of races, comes up.

Suzy Blanchet, the wife of a wealthy businessman, Dmitry Selivanov, was killed. Suspicion falls on Dmitry's mistress Svetlana, who had been with him for a long time and even received a share in his strip club. But soon unknown people set fire to the club ... The detectives learn that Suzy was aware of her husband's adventures and was secretly preparing for a divorce. The wife was the financial guarantee of her husband: it was thanks to her capital that Dmitry managed to raise his business. Suddenly, another person involved appears in the case - the despotic mother of Selivanov, who controls the life of her son and knew about a possible divorce.