Erdas is a land of balance. The spirit animal bond bridges the human and animal worlds. Conor, Abeke, Meilin, and Rollan each have this gift, and the responsibility that comes with it. But the Conquerors are trying to destroy this balance, swallowing whole cities in their rush for power, including Meilin's home. Ready to fight, Meilin has set off into enemy territory with her spirit animal, a panda name Jhi. Her friends aren't far behind, but they're not the only ones. The enemy is everywhere.