Following the reality-fracturing events at the end of House of Sky and Breath, Bryce Quinlan finds herself stranded in Prythian — the world of the Fae from A Court of Thorns and Roses — with no way home. Everything she loves is back in Midgard: her family, her friends, her mate. Alone in a strange new world and unsure who among its powerful players she can trust, she has to think her way back before the Asteri finish what they started.
In Midgard, Hunt Athalar is back in the Asteri's dungeons, stripped of his freedom and without any word of Bryce's fate. Ruhn is held alongside him, and their allies above ground — Ithan, Tharion, Lidia Cervos and the rest — are left to work in the shadows, hunting for a way to reach them while the Asteri tighten their grip on the city. Lidia's double life comes fully into the light, recasting much of what came before.
The third book in the Crescent City series, House of Flame and Shadow is its longest and most expansive entry, drawing threads from Sarah J. Maas's connected worlds together as the fight against the Asteri comes to a head.