After a century-long war with creatures from the planet Eridanus, people leave the devastated Earth and move to live on the planet Viona. A new era begins for humanity - rebirth. People create a new race - gene concentrates. They become settlers of the Earth and work to recreate its flora and fauna. The general concentrate named Zey-Bi, accidentally using the invention of her brother, moves to the past of the Earth, to medieval England of the 17th century...