Murder under the accompaniment. Maestro, you are a killer!

The famous jazzman Carlos River was shot down right during the concert. And it so happened that the inspector Roderik Alleyn was during the commission of a crime among the audience! But who is the killer? Lord Pastern-i-Baggott, who did everything for the promotion of the jazz-band Carlos, and in return received only black ingratitude? The harsh wife of the Lord, Lady Cecile, who discovered that Rivera was twisting an affair with her daughter, beauty Felis? Or someone else out of many enemies and envious people of the famous musician?
Inspector Roderik Alleyn-aristocrat, intellectual and the best detective Scotland Yard-at first glance became interested in the artist Agatha Troy. Unfortunately, his meeting with this witty woman took place under rather unpleasant circumstances ...
During the Master Class of Agatha, a model was killed in her country house, and the main suspect, painter and sculptor Garcia disappeared without a trace. However, this version is not too obvious? The further the investigation is the inspector Alleyn, the clearer he becomes - each of the guests can be a real killer