Formerly a police major, and now an honored pensioner, Vasily Makarovich Kulikov and his faithful assistant Vasilisa Selezneva are a very successful team of private detectives. He has vast experience in solving complex criminal mysteries and contacts with the police, she is extremely curious, energetic and has an ideal memory. Another case leads the detectives to a suspicious pet store. It would seem that there is something that can be investigated there? Marital infidelity of an Angora hamster or theft of cat food on an especially large scale? However, in reality everything turns out to be much more serious. And in order to expose all the attackers, Vasily and Vasilisa will need a lot of strength and courage. And not just anyone, but trained crows will come to their aid!