Kira Lipatova grew up in a family of chemist scientists and was accustomed to a certain lifestyle, subject to strict rules. Shortly before her thirtieth birthday, strange events begin to occur in her life: first, her neighbor is killed, then a work colleague dies almost before her eyes, and then an attempt is made on Kira’s own life. Together with her new friend Yegor, she plans to conduct a private investigation. The plan is simple - to provoke the criminals by using Kira as a decoy. The plan works, but the heroes are knocked down by the stunning truth - the killer who was hunting for Kira turns out to be her grandmother Matilda Genrikhovna and mother. In addition, Kira learns that Yegor’s mother and grandmother, who adopted him in an orphanage at one time, are actually her relatives. And this is not the last secret that Kira’s family carefully keeps... Editor’s comment: A detective story in which finding the killer is a matter of secondary importance. It is much more interesting to look at the patterns of family ties, woven by many years of misunderstandings, deceptions and secrets.