The continuation of Sarah J. Maas's series follows Feyre's sister, Nesta Archeron, who has always been proud and quick to anger. Against a backdrop of war and uncertainty, Nesta spends time with Cassian, which threatens to unearth feelings she would rather forget and awaken her powers. As they battle monsters both internal and external, Nesta and Cassian search for acceptance and healing. Their partnership may be the key to saving Prythian from the schemes of the mortal queens. It is a moving story about worthiness, love, happiness, and forgiveness.