A single rocket landed on the desolate frontier planet Eden. Romi and her lover George, who escaped from Earth for some reason , vow to make this planet their new home, but life on this undeveloped planet is tough. George lost his life in an accident while digging a well, and Romi decided to live a lonely survival life with her only son, Cain, and an AI robot. Romi decides to extend her life for Cain and goes into cold sleep. However, due to a mechanical failure, he has been sleeping for 1,300 years. When Romi finally wakes up, she becomes the queen of Eden 17, a huge town built by new humans. One day, a kind-hearted boy named Kom meets the grieving Queen Romi at the palace. Knowing Romi's nostalgia for her hometown, Kom decides to go to Earth with her, and while knowing that it's her reckless challenge, the two of them fly out into the vast universe. Along the way, he meets Earthling astronaut Makimura, space generalist Zudaban, and many unknown life forms beyond human comprehension, aiming for his home planet Earth.