As the greatest army ever assembled in the seven islands flies to the land of the dragons, everyone's mind is haunted by the same thought: Thisbe Stowe betrayed them all.

Thisbe struggles to regain the trust of her brother Aaron and the people of Artimé after one crucial mistake forces her to abandon her intricate plan against the Revinir. Aaron is devastated by Thisbe's actions and refuses to hear her explanation, feeling a sense of responsibility for the wrong she's done mixed with his own deep regret and fears over his dark history. Complicating things are Thisbe's conflicted feelings about the Revinir, leaving her wondering if she allowed herself to get too close to the dragon-woman...and if she really is more evil than good after all.

Risking everything they'd fought for since first being declared Unwanted, the people, creatures, and statues of Artimé and their allies make a final desperate attempt to take down the Revinir and bring peace to their world. But is the Revinir too powerful to defeat? And will the Artiméans ever find out what's behind that last secret door?