In the beginning was the darkness, and in the darkness was a girl, and in the girl was a secret...
In the domed city of Yuan, the blind Princess Isra, a Smooth Skin, is raised to be a human sacrifice whose death will ensure her city’s vitality. In the desert outside Yuan, Gem, a mutant beast, fights to save his people, the Monstrous, from starvation. Neither dreams that together, they could return balance to both their worlds.
Isra wants to help the city’s Banished people, second-class citizens despised for possessing Monstrous traits. But after she enlists the aid of her prisoner, Gem, who has been captured while trying to steal Yuan’s enchanted roses, she begins to care for him, and to question everything she has been brought up to believe.
As secrets are revealed and Isra’s sight, which vanished during her childhood, returned, Isra will have to choose between duty to her people and the beast she has come to love. 

I didn't ask for any of this. I didn't ask to be some kind of hero.
But when your whole life gets swept up by a tornado - taking you with it - you have no choice but to go along, you know?
Sure, I've read the books. I've seen the movies. I know the song about the rainbow and the happy little bluebirds. But I never expected Oz to look like this. To be a place where Good Witches can't be trusted, Wicked Witches may just be the good guys, and winged monkeys can be executed for acts of rebellion. There's still a yellow brick road - but even that's crumbling.
What happened? Dorothy.
They say she found a way to come back to Oz. They say she seized power and the power went to her head. And now no one is safe.
My name is Amy Gumm - and I'm the other girl from Kansas.
I've been recruited by the Revolutionary Order of the Wicked.
I've been trained to fight.
And I have a mission.

In this dark, high-octane sequel to the New York Times bestsellingDorothy Must Die, Amy Gumm must do everything in her power to kill Dorothy and free Oz.

To make Oz a free land again, Amy Gumm was given a mission: remove the Tin Woodman’s heart, steal the Scarecrow’s brain, take the Lion’s courage, and then Dorothy must die....
But Dorothy still lives. Now the Revolutionary Order of the Wicked has vanished, and mysterious Princess Ozma might be Amy’s only ally. As Amy learns the truth about her mission, she realizes that she’s only just scratched the surface of Oz’s past—and that Kansas, the home she couldn't wait to leave behind, may also be in danger. In a place where the line between good and evil shifts with just a strong gust of wind, who can Amy trust—and who is really Wicked?