Circus dog Belka and stray dog Strelka are typical "small-town beauties" who never dreamed of going to space. But space came knocking on their door! In an instant, the whole world was swept up in space fever, and our heroes couldn't escape their "space destiny"—because they are space dogs! This film is adapted from the true story of the real dogs sent into space by the Soviet Union in the 1960s!