Sal has lived her entire life working in the Underground, in a place called the Nest. The first law of the Nest is no one leaves, ever. In the Nest, knowledge is power, and power is dangerous. Power draws attention from the leaders of the Nest, who want all of it for themselves. The people who run the Nest call themselves the Tribe, and they will do whatever it takes to ensure the truth stays hidden. Even spill innocent blood.So when Sal discovers a way out, she's forced to make a choice. A choice that will change the course of her life, and the Nest, forever.