Two young scientists are exploring new fields of nuclear physics. Dmitry Gusev and Ilya Kulikov are good friends, but rivals in love. Dmitry marries Lyolya and they live happily together. Luck has it that he makes an important discovery. Unfortunately he exposes himself to radioactivity during the experiments. As a result he falls seriously ill. However Dmitry has a strong spirit. His will to live, the deep passion for his work and his strong love for mankind makes it possible for him to recover.
For many years, Sasha Lvova has been waiting for the return of her lover, pilot Aleksei Astakhov, refusing to believe in his death at the front. And he really returns to her and his son after captivity, but this is a completely different person, rejected by society, expelled from the profession. It is difficult to say how Aleksei’s fate would have been if it hadn’t for Sasha’s love, her ability to survive in the most difficult circumstances.
About Russian space program and missile industry, and it's founder Sergei P. Korolev, from the 1920s to the first man in space in 1961.
