Astrophysicist Arthur Nikitin is trying to save the Earth from the deadly threat posed by Supernova gamma radiation. For this purpose, a starship is being built under his leadership, and Nikitin’s friend, top-class pilot Oleg Gromov, who can withstand enormous overloads and radiation, is called to pilot it. But for some reason Nikitin’s project is causing a storm of protest in the world. Gromov is kidnapped and the project is in jeopardy. Who really wants to interfere with the salvation of the Earth?