Rebecca Yarros is an American author and is best known for the Empyrean fantasy book series.
The story starts with Violet, daughter of a high-ranking general in the kingdom of Navarre.
She is compelled by her mother to train as an elite dragon rider at Basgiath War College.
During training, she forms a rare bond with two dragons, and develops feelings for Xaden, whose father was executed by Violet's mother.
Violet discovers her "signet power" of controlling lightning through her dragon bond.
She joins Xaden on a mission outside the kingdom, where she learns that Poromiel's attacks on Navarre are to obtain resources to fight off "venin" - corrupted individuals who absorb life force and magic.
Authorities of Navarre deny the existence of venin, blaming Poromiel for the conflict.
Violet agrees to join Xaden's fight against the venin as they face a dangerous battle.
The truth about the ongoing conflict between Navarre and Poromiel starts to unfold, as Violet and Xaden unite against the real enemy threatening both kingdoms.