WORLDS KEPT THEM APART. DESTINY BROUGHT THEM TOGETHER. Aria has lived her whole life in the protected dome of Reverie. Her entire world confined to its spaces, she's never thought to dream of what lies beyond its doors. So when her mother goes missing, Aria knows her chances of surviving in the outer wasteland long enough to find her are slim. Then Aria meets an outsider named Perry. He's searching for someone too. He's also wild - a savage - but might be the only person who can keep her alive. And if they can survive, they are each other's best hope for finding answers.

Worlds kept them apart. Destiny brought them together. Outside the dome of Reverie, Aria and Perry are struggling to keep their people from tearing each other apart. Their situation is desperate, and with the Aether storms worsening time is running out for them to rescue Cinder from Hess and Sable. Cinder is both the key to unlock the Still Blue and their only hope for survival, so Aria and Perry assemble an unlikely team to attempt a daring rescue mission. They know that in a dying world, the bond of friendship is what matters most.