It’s incredible how things happen! You go to the opera to watch a fashionable production, and you end up… in the police lockup on suspicion of murder! Exactly this, to put it mildly, unpleasant incident happened to a private detective Tatyana Ivanova. But sitting behind bars isn’t for her. In that place the real killer of the opera troupe’s prima donna should be—such an unfortunate performer who came for a tour. And Tatyana Ivanova begins searching for the villain who committed the murder—only to find that the blame has been shifted onto her…