Some mysteries are better left unsolved. Colonel Degteryayev, who immediately after retiring, founded his own detective agency, clearly begins to understand the veracity of this phrase. Having hired an assistant Dasha Vasilyeva, he takes on the first case with her. Recently, Zinaida Lvovna Komarova has been terrorized by an unknown woman on the phone, posing as her granddaughter Varya, who has been missing for a long time.
Of course, the inspired couple of heroes are ready to figure out the situation, but what they managed to find out … In general, some secrets should really remain unsolved.