After Morwen's betrayal as the King of the Brais, Thea Knight is left trapped in a dimension she cannot escape from. Her best friend takes this chance to fight the enemy on her own. To save Sarah and kill the King, Thea is thrust into finding a fast and dangerous solution. The secrets hidden in every corner of the castle unlock new opportunities and tools to defeat Morwen, but it is just a matter of choosing the right ones. As Thea unravels the King's history, she discovers just how much their fates have been intertwined, pushing her toward the path that could mean the sacrifice of her friends, her loved ones, and herself.

The battle to end the war looms ever closer. Vampire, witch, werewolf, and new allied forces come together in a bloody finale, all to see their vision of justice become true.