About the book: 2014 / Nikita Krasovsky, the owner of the Bis Theatre, turns to private detective Vadim Alimov with a delicate request. He reports that the prima of his theater, Irina Izvolskaya, receives terrible anonymous letters, the author of which threatens to pour acid on her if she goes on stage again. Krasovsky invites Alimov to find out which of the four soloists rehearsing with Izvolskaya is trying to intimidate her. During the investigation, it turned out that everyone around her has a reason to hate the singer…