A little boy named A Yuan puts on a spacesuit and unexpectedly meets Diandian, a little elf from deep space. The boy and his new companion embark on an adventure across the solar system, meeting mysterious messengers who take the forms of planets and discovering the wonders and grandeur of the universe. This is a heartwarming, whimsical space fairy tale that introduces children to science. Join A Yuan as he explores the vast sea of stars and gets to know our cosmic home.