Katya lives with her sister and is under her strict control, which she calls care. Marina, Katya’s sister, believes that the world around them is dangerous and cruel. Marina has no idea how right she turns out to be: one day she stops answering Katya’s calls, and then she realizes that something terrible has happened... Anna Danilova is a professional writer, works in different genres (surrealism, realistic prose, children's stories, drama), She has several plays and scripts to her credit. But most of the works are written in the psychological detective genre. The author’s books have been published in many Russian publishing houses, and also translated into Bulgarian and Turkish languages and published in Sofia and Istanbul. Since 1998, Anna Danilova’s detective stories have been published by the Eksmo publishing house in series such as “Detective Through the Eyes of a Woman”, “Detective by Freud", "Russian bestseller", "Crime & private", "The Moth Effect", etc. In total, more than 120 books by the author have been published. The "Moth Effect" series is not only a classically elegant crime novel, but also an eternal duel of passion and reason, reality and dreams, impulsive emotions and naked calculation. The fate of the heroes is decided by the master of psychological detective Anna Danilova!