Jo's mom disappeared fifteen years ago. In their small Appalachian town, everyone thinks they know what happened to her and that Jo is turning out just like her: wild. Jo's barely passing school and falls asleep in class. People blame it on a boy or drugs, but Jo's secret is that she has a twin sister who lives in the woods. Jo slips out at night to meet her. No one's ever seen Jo's sister, so when she attacks a local boy, everyone thinks it was Jo. Jo has to decide if she should tell everyone about her sister or if she should run.