About 12 billion years ago the Universe appeared. It became a common home for matter, fields and all living beings. The structure of the Universe was based on the simple principle of Gravity and the dual nature of the universe. Galaxies and black holes, stars and planets, nuclei and particles, male and female principles were created. For hundreds of thousands of years, people who appeared on planet Earth were surrounded by the magic of mysterious signs and the most important of them - the number 12. For a long time, humanity could not understand the true meaning and importance of this number. It was given divine significance and used in timekeeping systems and calendars. However, very soon all living beings in the Universe will have to realize the true importance of this number... The key and most ambitious work of Alexander Romanov, the “Gravity” trilogy, is high-quality science fiction, not inferior to the work of the Strugatsky brothers in the flight of philosophical thought, and in artistic presentation and scale even superior to them.