Llassar is an occupied country- but nobody seems to know it.
Fae began to filter slowly into the land shortly after the birth of the crown princess, Dion ferch Alawn, supposedly fleeing a dark threat in Faery known as the Guardians. But that was fifteen years ago, and now there isn't a town in Llassar that isn't populated by or under the control of the fae.
Smaller, weaker, and less talented at magic, Llassarians are quickly finding out that there's no fighting the invasion that crept in so quietly and politely. Even the castle isn't free of fae: those closest to the king and queen are faery advisors.
When Dion ferch Alawn returns from a carefully sanitised tour of Outer Llassar, the most exciting thing she expects from the near future is the present her twin sister Aeron promised for their seventeenth birthday.
Then her carriage breaks down, and Dion gets a taste of what the real Llassar has become: desperate, enslaved, and ripe for rebellion. Getting home safely is just the first problem she faces: the real struggle begins when Dion returns to the castle. Her new knowledge is inconvenient and unwelcome- to declare it, treason.
Her parents expect her to publicly embrace the Llassarian policy of acceptance and deference to the fae.
The common Llassarians, their injuries passed over and their weapons long since confiscated, expect her to fight for them. Dion must choose between doing what is convenient and politic, and what is right.