At the center of Anton Chizh's retro detective story is again St. Petersburg detective Rodion Vanzarov. This time he not only solves crimes, but also maneuvers between a beautiful lady - the wife of a very influential man - and a spiritualist circle. And his friend, the brilliant criminologist Apollo Lebedev, finds himself involved in the struggle between science and pseudoscience and, speaking under the banner of truth, confronts charlatans and swindlers. The case that Vanzarov and Lebedev are dealing with is simple, but complicated, and only thanks to the “psychology” developed by the detective is it possible to bring the criminal to clean water.