About the book: 1957 / Shortly before the treacherous attack of Hitler Germany on the Soviet Union, a young talented scientist Heinrich Klemme worked as an assistant in the laboratory of Professor Orbi. Klemme had no idea that the mighty energy of the atom could not only serve for the benefit of humanity, but also bring untold disasters. By chance, the scientist learns that the Nazis want to use this discovery for military purposes, to use it for the mass extermination of people. In the summer of 1941, Klemme crosses the front line... The adventures of Heinrich Klemme and his new friends - Doctor Trostnikov and his daughter Toni, schoolboy Misha Smolintsev, pilot Bagreychuk and others - are told in this story.