"Throne of Glass" by Sarah J. Maas follows the journey of Celaena Sardothien, a skilled teenage assassin, who is imprisoned in a harsh labor camp. After being rescued from her grim fate, she is offered a chance at freedom by participating in a deadly competition to become the king's champion. Celaena's fierce determination and exceptional skills set the stage for her rise, but the stakes are high, and she quickly realizes the dangers that lie ahead.
As Celaena navigates the challenges of the competition, she builds alliances and faces betrayals, uncovering dark secrets about the kingdom and its rulers. The story delves into her internal struggles, exploring her desire for independence and her haunting past. Along the way, she forms complex relationships with key characters, including the prince and the captain of the guard, adding layers of romance and intrigue to her journey.