The man disappeared without a trace. Is it possible? And there are many such cases. Maybe the people who disappeared from our world ended up exactly where their potential is in demand and they live their lives to the fullest. If they work, then to the point of exhaustion; if they starve, then truly, to the point of colic in the stomach. And if they are in danger, then it is real, with huge fangs, claws and animal agility. And the friendship there is real, and not implicated in material gain. And the love is sincere, and not an advertising surrogate. So the heroes of this book accidentally fell deep into the past. For our world, they disappeared, but for a world where Homo sapiens did not yet exist, they appeared out of nowhere and began to adapt this world to themselves.