Maria Kramer, the owner of a real estate agency, died at the hands of robbers who attacked her in her own apartment, and it is unlikely that the criminals will be found. But her daughter did not believe the police version, so she turned to private detective Tatyana Ivanova. Irena’s proposal came in very handy: Tatyana had been without work for a long time and, accordingly, without money. That’s why she took on this seemingly hopeless task. Naturally, a version came to her mind - the murder was connected with Maria’s professional activities. And indeed, on her first visit to the agency, Tatyana was convinced that not everything was clean there. The former deputy of the owner, Ostapchuk, was doing very unsightly things behind her back. And yet, this was not why Maria was killed. It seems that love affairs are to blame and they lead to the distant past, to the mystery of Irena’s birth...