Aileana Kameron is no ordinary Victorian debutante. By day, she navigates the glittering society of 1844 Edinburgh. By night, she battles the deadly fae that threaten humanity. For centuries, her family has upheld a sacred duty: ensuring the ancient, magical prison beneath the city stays sealed.

But cracks are forming in the barrier. The monsters she once hunted now hunt her, and the fate of the world teeters on the edge. To stand a chance, Aileana must turn to Kiaran MacKay, a breathtakingly dangerous fae assassin whose dark past hides secrets as sharp as his blades.