Samuel has finally fallen - but Alex Muir knows that as long as the Azure is divided, no-one is safe. Alex must find a way for the Azure and the Depths to co-exist before the bloodbath begins again. But that means reaching out to Samuel for help - and trusting him is the last thing she wants to do. As the death toll rises, the cracks start to show. With traitors in their midst, friendships crumbling, and many struggling to resist the pull of the Depths, life becomes more brutal than ever. A vicious, three-sided battle is looming. And Alex has to decide what - and who - she can risk losing for the good of the Azure.