Man disappeared without a trace. Would that be possible? And there are many such cases. Maybe the people who disappeared from our world got exactly where their potential is in demand they live life to the fullest. If they work, then to exhaustion, if they starve, then really, to colic in the stomach. And if they are in danger, then real, with huge fangs, claws and animal agility. And the friendship there is real, and not implicated in material gain. And love is sincere, not an advertising surrogate. So the heroes of this book accidentally fell deep into the past. For our world, they disappeared, and for the world where the Intelligent Man did not yet exist, they arose out of nowhere and began to adapt this world to themselves.