A time machine is an old dream of humanity. Ellis Rogers, an engineer from Detroit, managed to bring it to life and set off on a journey two hundred years into the future. And he really found himself in the future, only not two hundred years later, but two thousand years later. Of course, everything has changed. And it looks like it's for the better. People live in beautiful underground cities, and the surface of the Earth is a huge natural reserve. In the new world there is no old age, disease, death, war, religion or need, and human society consists of asexual clones that live and thrive for centuries. People have long forgotten what aggression is, goodwill and gentleness reign in relationships, everyone can choose an activity to their liking. And in this brave new world, American engineer Ellis Rogers witnesses a mysterious murder on his first day...