2046th year. Scientists were able to defeat serious diseases thanks to the emergence of living nanorobots - xenobots. Genetic engineer Mark moves with his family to the village of Svetoch near Moscow, where the new Xeno laboratory is located. The scientist will work on creating biorobot animals, whose time has already come. Livestock farming needs xenobots: they are fed several times less, and receive more milk, meat and wool. Mark and his colleagues begin creating the first biorobot rodents.