Everyone is possessed by their own demon. Someone, like Faust, chooses Mephistopheles, and someone chooses the demon of Descartes himself! The Cartesian demon of skepticism and doubt, giving a person double vision of things and phenomena. Vladimir Rafeenko’s hero Ivan Levkin is doomed to be reborn from time to time, and every time his close and dear people do not recognize him. Wandering around the world under other people's guises, Levkin remembers all his past incarnations and suffers from the fact that he cannot choose only one fate. And Descartes’ demon laughs at him and, as usual, wants evil and does good...