As the King of Adarlan's Assassin, Celaena Sardothien is bound to serve the tyrant who slaughtered her dear friend. But she has vowed to make him pay. The answers Celaena needs to destroy the king lie across the sea Wendlyn. And Chaol, Captain of the King's Guard, has put his future in jeopardy to send her there. Yet as Celaena seeks her destiny in Wendlyn, a new threat is preparing to take to the skies. Will Celaena find the strength not only to win her own battles, but to fight a war that could pit her loyalties to her own people against those she has grown to love?