Ada and Isavel still aren't sure if they are enemies, allies, rivals, or something else entirely - but the world is conspiring to force them into a decision. Peace between humans and their inhuman neighbours is crumbling, a millenium of stasis can no longer hold, ancient gods are losing their grip on Earth, and something from beyond the world is coming.
There are cities to save, curses to lift, and exiles to end. Ada must say goodbye to the few allies she has, and her time to solve an ancient wrong done to humanity is running out. Isavel must save a city that will no longer listen to her, and is rushing into a war it may pay far too dearly to win.
To achieve anything at all, the two of them may need to close the gap that separates them and start anew.