Finally, the lost histories of the Catastrophe will be revealed and with them the ultimate fate of the buried city of Recoletta in thedramatic conclusion to Carrie Patel's trilogy.

With Ruthers dead and the Library Accord signed by Recoletta, its neighbours, and its farming communes, Inspector Malone and laundress Jane Lin are in limbo as the city leaders around them vie for power.

A desperate attempt to save Arnault from execution leads to Malone's arrest and Jane's escape. They must pursue each other across the sea to discover a civilization that has held together over the centuries. There they will finally learn the truths about the Catastrophe that drove their own civilization underground.