Teenagers Cade McKenna, a transgender prince doubling for his brother, and lady-in-waiting Valencia Palafox/boy assassin Gael Palma, thanks to their concealed identities, do not realize they are simultaneously falling for and trying to destroy each other.

Cade McKenna is a transgender prince who's doubling for his brother. Valencia Palafox is a young dama attending the future queen of Eliana. Gael Palma is the infamous boy assassin Cade has vowed to protect. Patrick McKenna is the reluctant heir to a kingdom, and the prince Gael has vowed to destroy. Cade doesn't know that Gael and Valencia are the same person. Valencia doesn't know that every time she thinks she's fighting Patrick, she's fighting Cade. And when Cade and Valencia blame each other for a devastating enchantment that takes both their families, neither of them realizes that they have far more dangerous enemies.