Her mission is to protect Etheria. But she can't do it alone. After the battle of Bright Moon, the Horde army has retreated. But Adora knows they'll soon be back. Now the Princess Council is searching for a way to make the Rebellion stronger. Then they discover a First Ones mural that shows an island full of animals with magical powers. Are these magical creatures real-- and will they help the Rebellion? Adora and her friends set out on a quest to investigate. But they aren't the only ones on Etheria looking to strengthen their cause.