Alexandra Andreeva, a major in the special department of the FSB, receives a new assignment - to investigate the rape of a certain Yulia Filippova. The victim claims that the rapist is a demon who flew into the window of her apartment on the sixth floor. Alexandra and her assistants - cheerful and sharp-tongued Petya Zagin and Vanya Kupchik - will not only have to find and neutralize the demon, but also discover the connection between the crime and issues of state security, which the strict authorities chose to keep silent about. Alexandra and her colleagues begin to methodically pull the thin threads, not suspecting what tangle of cruelty, greed and lust they will have to unravel...