It's been a long time since private detective Tatyana Ivanova was so bewildered by the circumstances of the case she took on! Well, she can’t determine who and why is making an attempt on the life of her client, the head of a company that deals with security systems. And the assassination attempts are very strange! Taking on the functions of a bodyguard, Tatyana saves the client, but the bullet overtakes his wife Alena. The investigation quickly comes to a dead end, because there is no evidence, no motive is visible. Another contract murder would have remained unsolved if not for Tatyana’s stubbornness...