Connor is going to be unwinded. He has trouble at school, and gets in fights all the time. So one day he discovers that his parents are unwinding him, because he is still under 18, and between the ages of 13-18 they can send him to a facility to dismember him. But nothing goes to waste, so technically he's not dying. Its not murder. Only it feels like it is. 
 Society thinks its a really noble act, to sacrifice yourself so other people can get transplants and live. Some actually raise their children to be unwinded, because its the ultimate good cause. But its also an wasy way out for parents who cant control their children, and for the goverment that has too many orphans that can't take care of. And there is a whole bussiness behind this: hunters, a black market, and people who just want to have a better body or pretty eyes. Kids become currency in the eyes of society. 
 Lev is a kid that is going to be unwinded since birth. His family has raised him for this, and he is really proud of this. 
 Risa is an orphan that pays the piano, but not even her talent can save her life. The state decides she will be unwinded. 
 But when Connor is on the run, he shoots a cop and makes a scene in the middle of the street, he takes Lev as a hostage and flees. Risa takes advantage of the confusion and follows them. Now on their own, they will do their best to try to survive. Even if Lev is against them. 
 I loved this book. The world is amazing, so wrong and so haunting, but at the same time so close to reality. There are actual cases referenced through the book, and that makes it even scarier. 
 I loved the characters. Connor with his moral sense but also his short temper, Risa with her will to live, and even Lev is great in the end. It's all so cruel and scary, but it also kinda makes sense. Society and its necesity to look the other way when its consumis and confort is in jeopardy. How easy is for people to mark others as failures, discarding them from society. Its a world so plausible that I can actually see it happening, and its really scary.