Lelya, a friend of writer Sonya Markhaleva, has had her husband, banker Turyansky, kidnapped and demands an unthinkable ransom. Sonya believes that only she can find him. Visiting Lelya, she, exploring the banker's safe, found a contract between him and his deputy Pertsev, which stated that in case of natural death of one the other inherits the bank. The kidnapper Pertsev? But then Sonya discovered that Lelin's husband had collected dirt on everyone he knew, even on her. So there are a lot of people who want him dead. She suspects that the banker is kept in the mansion of the famous magician Korovin. "I would not be Sonka Markhaleva, if I do not bring the criminal to the clean water," - decides the writer and sneaks into the basement of the house of the wizard ...