Escaping Camp Ravensbrook

Katrina is a girl who is caught and captured and is sent to Camp Ravensbrook after her parents die. She's treated terrible there, but Katrina has a secret. She has witchcraft powers she uses for good, but Katrina wants to find a way out of there. When she meets Peter, she realizes that he's the right man for her. But she's worried about the fact that he might not accept her witchcraft powers. Will they be able to make it out in one piece despite the horrors of a war going on? Or will they be sentenced to this camp forever?