The story revolves around the tail-wagging and mustachioed cosmonauts and astronauts who work at a lunar base. The main heroes bravely traverse the expanses of the Universe in search of extraterrestrial civilizations. On Earth, space exploration continues, and the dogs Belka and Strelka, who successfully completed the first flight beyond the planet, became famous worldwide. They gained followers who want to replicate the dogs' feat and experience what it's like to spend several hours, days, or even weeks in zero gravity.