Elena Davydova, the owner of the Bureau of Magical Services, was approached for help by her former classmate, now an intelligence officer. There have been several strange murders in the city, and he suspects that Elena is connected with them, because all those killed were once in a love affair with her, and their deaths defy rational explanation. Elena and her friends from the Bureau began their investigation, and it led them to a stunning conclusion: the killer is a woman very similar to Elena, who is taking revenge on her for something in such a terrible way. Now Elena will not stop until she meets the stranger face to face, because she has been given a real challenge...