A former friend has betrayed the Raksura and their groundling companions, and now the survivors must race across the Three Worlds to rescue their kidnapped family members. When Moon and Stone are sent ahead to scout, they quickly encounter an unexpected and potentially deadly ally, and decide to disobey the queens and continue the search alone. Following in a wind-ship, Jade and Malachite make an unlikely alliance of their own, until word reaches them that the Fell are massing for an attack on t