The distant future. Somewhere in space there is a very dangerous planet. The main characters are twins Naiva (girl) and Leitane (boy) Luntaev, ten years old. They live with their mother, father, grandfather and younger brother in a cave, along with several thousand of their fellow tribesmen. In the mornings, all members of the tribe go to work to farm, collect firewood and other resources. In the evenings - if they manage to escape from predatory lizards, dragons and flying semi-intelligent animals (harpies) - they return back in time to close the gates. At night, the gates are not opened in fear of the inhabitants of the night, who are much more dangerous than those of the day. The adventure begins when a spaceship arrives to explore the planet, but bad luck - all the astronauts die from the attack of local monsters... But the children warned them! A simple action fantasy - "run from monsters", entirely based on the story by my daughter (9 years old at the time of writing). So don’t expect philosophy, just adventures. Authors: Plot, characters, names - Anastasia Lavrova (age at the time of creation of the book - 9 years). Typing, technology, combat episodes - Vladimir Lavrov.