Third-generation magician Clarissa von Reichenbach finds herself drawn into an illegal adventure by her friend and ward Natasha Georgieva. The forbidden book of Professor Kravtsov, which fell into their hands, contains secrets that can change the world. But in order to read it, they break a string of laws, not suspecting that they are under the hood of the gendarmerie and the police, and their random assistant, a locksmith, is actually an agent. Will the girls be able to find out the secrets hidden in the book? Will you be able to extricate yourself and avert the suspicions of the police? What changes in society and in the world will this seemingly trivial household magic bring about?