Life on Earth has changed after the visit of alien ships hovering in various parts of the planet. Their passengers — biopages or "Vitaliki", as they are popularly called — produce a substance called "prak". Its purpose, as well as the purpose of the aliens' visit, is unknown, but nurse Nina (Irina Salikova) from a quiet provincial town hopes to help her sick father with the help of prak. After contacting Vitalik, Nina learns the truth about extraterrestrial beings, which completely changes her life.