Leyla McQueen has finally reunited with her father after breaking him out of Broadmoor—the illegal government prison—but his freedom comes at a terrible cost. As Leyla celebrates his return, she must grapple with the pain of losing Ari. Now separated from the boy who has her heart and labeled the nation’s number-one enemy, Leyla must risk illegal travel through unchartered waters in her quest for the truth behind her father's arrest. Across Britain, the fallout from Leyla's actions has escalated tensions between Anthropoid and non-Anthropoid communities, bringing them to an all-time high. And, as Leyla and her friends fight to uncover the startling truths about their world, she discovers her own shocking past—and the horrifying secrets behind her father’s abduction and arrest. But as these long-buried truths finally begin to surface, so, too, do the authorities’ terrible future plans. And if ever-pervasive fear prevents the people from taking a stand now, the abyss could stay in the dark forever.