Leilani Falconi is a top agent for the Imperial Investigative Service, tasked with policing the veil between two realities. Long ago, the Great Sundering tore the universe into two mirrored halves; aether space, which progressed using magical energy or eldrich, and kuldain, which advanced via electromagnetic technology.

But now a series of suspicious deaths stretching back more than a decade has the agent trapped directly between secretive bureaucracies and their peoples. If she can't solve the mysterious crimes in time, existence as she knows it could erupt into chaos.