With tensions rising and their powers no longer a secret, the Nightbirds must decide for whom and for what they are willing to fight for and how far they will go in the spellbinding conclusion to the international bestseller Nightbirds.

The Nightbirds were once their city's best-kept secret, but now the secret's out. Everyone knows there are girls who can gift their magic with a kiss, and everyone wants a piece of them. Such girls are in more danger than ever. But Matilde, Sayer, Æsa, and Fenlin can do feats of magic no one has seen in centuries. They're like the Fyrebirds of old: powerful women who once moved mountains, parted seas, and led armies. But they don't want the world to know the full extent of their power – not yet.

Matilde is too busy trying to show the city that girls with magic can be trusted while Sayer stalks the night, punishing any man who dares cross her. Fen struggles to keep her gang together and her magic hidden while Aesa tries to settle back into life in the Illish Isles.

But fate tugs them inexorably toward each other, and back into the fight to protect magical girls. As the new suzerain works to lift the prohibition on magic, the churchmen who support it – and the gang lords who profit from it – whisper rebellion. The Nightbirds' old enemies are rallying, too. Smelling blood in the water, a magic-mad Farlands king threatens to invade Eudea. As war looms, and the Republic's fate hangs from a knife's edge, the Nightbirds have to decide if becoming Fyrebirds is worth risking the lives and loves they might have had.