The TV series "Particle of the Universe" is a drama about the fate of a cosmonaut embarking on his first space flight. Andrey Kamanin was a successful entrepreneur, but he chose a career in space over business and trained in the cosmonaut special forces. One day, he learns that he has been accepted into a team going to the International Space Station to solve a serious technical problem. However, when he shares this joyful news with his beloved wife Nadezhda, she confesses that she doesn't intend to wait for him because she has fallen in love with someone else.