The client invited a prostitute to his hotel room, took a shower, drank mineral water and died. According to the documents, the deceased was listed as businessman Boris Zaitsev and, according to the examination, died from potassium cyanide. However, Zaitsev’s wife Alla Swinger did not recognize her husband at the morgue. Who is poisoned and where is the real Zaitsev? The motives for the unusually complicated crime go back to the school years of the newly-minted widow, and the diabolically complex murder combination was carried out by... (you will find out who the killer is after reading the book)...