In a world where Prythian and Erilea were once one, Aelin Ashryver Galathynius is the Queen Who Was Promised.
After crossing realms, discovering earth-shattering information about her past and future, and bonding with her mates, Aelin has returned to Erilea ... alone.
Desperate to protect her mates and give them a future they deserve, Aelin has begun her hunt for the Wyrdkeys. She has a battle ahead of her, fighting for two worlds, for her people and for vengeance, she will be faced with foes of all kinds and forced to confront the shadows of her past.
She will do anything to defeat the valg and reforge the realms, even make the ultimate sacrifice.
Back in Prythian, her mates are furious they've been left behind, and are perilously close to self-destructing as they scramble to find a way back to her.
Will Aelin prevail in taking down Erawan and Maeve, and bring the worlds back into balance while new threats emerge from all sides?
Will her mates be able to find her before it's too late?