Samantha has lived her whole life in different foster homes. Now living in a small town, she never feels like she quite fits in, even with her own current foster family who might adopt her, or the boy who follows her around doing her classwork. So, it’s perhaps natural that she doesn’t know what to do with a curious tagalong little sister named Olivia. One day, Sam callously ditches Olivia, who wanders off into the woods on her own and disappears.
For three days police and panic set in on Sam’s home. And then, Olivia returns unscathed as if nothing happened. It seems like a miracle until Sam starts to notice strange new things about her younger sister. Things nobody else seems to notice. Too scared to speak out of place, she doesn’t know what to do until she starts to learn that this has happened before.