In the frozen landscapes of Prythian, Feyre Archeron must navigate treacherous politics as she seeks to avenge her sister's death at the hands of Amarantha. As the new High Lady of the Spring Court, Feyre must balance her duty to protect her people with her growing feelings for Rhysand and his mysterious court.

With the help of Cassian, Azriel, and Morrigan, Feyre embarks on a perilous journey through treacherous landscapes to rescue her sister and bring down Amarantha once and for all. But as they face danger at every turn, Feyre begins to realize that her own powers may be the key to their victory.

Will Feyre be able to overcome her fears and doubts to save Prythian from the darkness that has consumed it? Or will the shadows prove too powerful to overcome? Find out in the thrilling conclusion to the "A Court of Frost and Starlight" series.