Good manners of the Nightingale robber

The violinist Alla Fedina came to the detective agency of Max Wolf. Barely hiding the excitement, she admitted that she was very afraid for her life, because they are trying to poison her.
It turns out that after the concert, Fedina was handed a cake behind the scenes. It so happened that they had a cleaning lady and ... instantly died. And here"s what is interesting: the cake was conveyed by a young woman who introduced herself as the daughter of Vera Aramakina - a long -term fan, a faithful fan of Fedina. But why did not Vera bring sweet to her idol? And because I recently died ...
The frightened violinist begs Max and Evlampius to find this girl. And find out: was Aramakina"s daughter at all?