Five friends (Yura, Jules, Lika, Krest and Kostya) notice that their classmates, seemingly unrelated to each other, are steadily disappearing. Teachers attribute this to their parents ' sudden decision to move to another city. Parents do not pay attention to this, assuming that the child is just seriously ill and is in a local hospital. But these explanations do not seem plausible to the guys, and they decide to initiate their own investigation.

Nina lived in a private house near Nizhny Novgorod with her third husband, Kostya, who not only raised their common daughter with Nina, but also her two children from other marriages. And besides, he helped Nina's ex-husbands, a would-be businessman and a crazy professor, with money.