MAGIC IS FADING FROM THE WILD WOOD. To renew it, goblins must perform an ancient ritual involving a newborn changeling. But when the night arrives to steal the baby, things go terribly wrong, and the goblin is forced to leave both the changeling and human child behind. Tinn and Cole are raised as human twins, neither knowing what secrets may be buried deep inside one of them. When they are thirteen years old, a mysterious message arrives, calling the brothers to be heroes and protectors of magic. The boys must leave their sleepy town and risk their lives in the Wild Wood, journeying through the Deep Dark to reach the goblin horde and uncover who they truly are.