The director of the nightclub Agarov died from methyl alcohol poisoning. Police Major Klotov, who is investigating this case, comes to the conclusion that Agarov was poisoned deliberately and that this crime was committed by a person with access to the nightclub bar. But here’s the strange thing: the detective cannot understand who benefited from the death of the weak, passive and completely poor hired director. And then Klotov finds out that a few hours before his death, Agarov left some message on his wife’s answering machine, but the tape with the recording suddenly disappeared without a trace...