The book is not just another fantastic novel, it is designed to cause a burning desire to change life, to reconsider their daily, established priorities and think about the values for which we live. The fates of a wide variety of characters: people from the future and the present, dead from the past, angels and servants of Lucifer are intertwined and merged together on Earth, in Purgatory, in Hell and the heavenly City. Humanity, like Sodom and Gomorrah, has rapidly deteriorated, mired in sins, disregarding moral norms and stifling the voice of conscience, desperately trying to reach us. Already in 2099, the concept of love the strongest word in the universe disappeared from the face of the Earth. No one knows what this feeling is, why it is needed and what its purpose is. The old grandfather-scientist, a fanatic of the past, must have time to dictate the will to his grandchildren Denis and Arthur, to tell how to rid the world of emptiness, grayness and selfishness with the help of a crystal heart. The brothers are waiting not just for a journey through time, they will fall into the epicenter of human lives, on their way there will be victories and defeats, temptations and betrayals. Which of the brothers will give his soul to the Devil? ......... He has a great power over human life...... [ And who will take the side of the Light and the fighter for eternal values? Will Lucifer's servants allow , knowing all the "pain points" of the human soul , win another round in the eternal confrontation between Good and Evil and return to humanity unlimited sacrificial love? This is not a book that we want, but a book that we can never reach. The book is a reality subject to the laws of the just and selfless Creator of the World, and not the norms and foundations of modern society.