This is the third book about Valentin Lunin and his sister Anka, who until recently were ordinary children from the Russian outback, and now with their mere existence they can turn three worlds upside down: the human world, the world of Atlas and the world of the Upside Down, in which those who took refuge took refuge. who in ancient times felt too crowded around people. Brother and sister, two coveted prizes in the games of human intelligence services and the immortal descendants of the Atlanteans, no longer have the right to an ordinary life, because they are the Future. But they will have to fight for their own future. Sister - with the monsters of the other world, brother - with people eager to master the secrets of immortality and crushing weapons, people much more dangerous than the bloodthirsty monsters of the Upside Down.