Eider lives with the other children in the compound. They are taught by Teacher and cared for by Nurse. They believe the world outside has come to an end and they are all that is left. Teacher believes these children are special and will one day rule the world. She is trying to prepare them for that eventuality. Eider is not one to accept things though. She remembers having a little sister even if everyone is trying to convince her she didn't exist. She questions why Teacher only teaches them certain things. She collects bits of paper from outside the compound and is curious about the world beyond the fence. 

I really did like this book even though there are some definite problems with the story. I loved Eider and her curiosity and determination. I also really liked the other kids and how they all complimented each other in skill and ability. What I wanted more of was the why and the how. Why did Teacher and Nurse create the compound and bring the children there? How did they even get the children? Why did Teacher believe they had special abilities? How did no one know about this place? I also thought it was just a bit to coincidental that Eider makes her way through 80 miles of desert with barely any supplies and comes to no harm and the first person she meets happens to be her sister's foster brother. Sure it ties the two books together and proves she existed, but it was a bit too neat.