Events full of dangers and secrets unfold during the period of a ruthless inquisition that mercilessly destroyed the residents of Europe for heresy and deviation from the faith. The main character is a young alchemist, magician, and occultist. He searches for an ancient treatise that will allow him to control demons of Hell and other entities inhabiting the world of darkness. This ancient grimoire also plays a special role in the long-standing struggle between two powerful secret magical orders: the Order of the Fallen Angel and the Order of the Keepers of Death. For the sake of his mission, the sorcerer is forced to serve his enemies and, risking his life, go toward his goal. As a rule, a person who gains mystical and supernatural power in exchange gives up their soul. Will this be in store for the hero of the book?