Tom Egeland is a leading Norwegian writer working in the genre of historical intellectual detective, the author of the brilliant cryptological novels “The Broken Circle” and “Keepers of the Covenant”, translated into 17 languages. Fate throws the Norwegian archaeologist Bjorn Belt to the Kiev-Pechersk Lavra, from where he secretly exports to Norway and then to Iceland a mysterious scroll, supposedly the Gospel of Lucifer that scientists have been looking for for so long. From this moment on, mystical horror bursts into Belte's life. One after another, people associated with the manuscript die. Their murders are clearly ritual in nature. Belte's life is on the brink of death. But who is committing these terrible murders? And how are the killers connected to the discovered manuscript? Does this text contain an omen of the coming of Satan to Earth or does it carry some other meaning? One thing is certain: in the mythology of almost all nations there is the image of a flying angel who descended from heaven and became the ruler of the underground kingdom of the dead, hell. So was there really some real event in the distant past of humanity that formed the basis of the myth about the fall of Lucifer, the Angel of Light? And will the excavations of the legendary Tower of Babel, the ruins of which supposedly hide the answer to one of the most exciting questions: what is the nature and place of man in the cosmos, help solve this mystery?