After losing their parents to a tragic incident, eleven-year-old twins Thor and Rai Klein are exiled from their native planet. Their journey leads them to Chimaera, a harsh world ruled by carnivorous flora and divided human factions called 'Rings.' Encountering a youth named Zagi, the twins grasp that only the 'Jyu Oh Sei,' the master of these Rings, can escape Chimaera. Determined to unveil the truth behind their parents' demise and find a way back home, Thor braves the unforgiving wilderness. Yet, amidst the power struggles among the Rings, Thor unravels not only his family's secrets but also the destiny of humanity on this enigmatic planet.