By the 22nd century, voyaging through space, establishing settlements on other planets, and engaging in anti-gravity basketball have lost their novelty. Earth's declining conditions have driven people to flee to neighboring planet colonies. Luna, a newcomer at school, joins her classmates on a field trip with her robotic pet, only to find themselves stranded on an uninhabited planet during a gravity storm. Taking charge of the team, Luna leads a diverse group of personalities, including the independent Kaoru, the privileged Howard, the shy Sharla, the amenable Bell, the haughty musician Menori, and the young prodigy Shingo, alongside her robotic feline, Chako. Together, they must endure unforgiving surroundings and tackle various challenges to ensure their survival. But, could they be under threat from an unseen foe waiting to ensnare them?