Dasha Vasilyeva is a true master at getting into dangerous situations! This time, Dasha agreed to help her daughter’s friend Tasia and take part in a psychological experiment. To study the behavior of people from different social classes, pairs were selected: rich and poor, successful and marginal. Dasha has to spend a week without being separated even for a minute with the student Ksyusha Koroleva—right in the small apartment where the girl still lives with her alcoholic father, mother, and younger sister. Dasha has to accompany Ksyusha everywhere, even when Ksyusha is invited to the night club “Pavlov.” From there they go to an elite residential complex “Monpalas,” where their terrifying adventures begin. Corpses, blackmail, hypnosis… But Dasha and Ksyusha figured everything out—true, with the help of Vіk, the wonderful and devoted admirer of Ksyusha…