Gayle never thought she would leave Callisto Station. But that day arrived. Returning to Earth was a dream for her parents, but a nightmare for Gayle. She wasn't alone. She and the rest of the Callisto Group found themselves moving to Earth. There they had to deal with the excessive gravity, school bullies, overcoming open skies, and bad air. Then the worst news came: The Callisto Group was about to be broken up. The only way to prevent that was to pull together as a team. To put their plan into action, they would have to leave their parents behind, perhaps never to see them again. Could they do it? Would they go that far to keep their group intact? Could they avoid the many obstacles set in their way? Read the adventures of Gayle, Alicia, and JJ as they plot their return to their home, Callisto Station.