More than two sides

God and the devil always sent down there apprentices to see how things where going on in earth, but they don't know that there working for them until they're 16. Zara has always done this and it's always gone okay for her but she hasn't been on earth for 4 years. When she finally turns 16 she finds her-self passing out in a testing room, while being the devils apprentice. And when she wakes up she finds that shes in a room with a boy that seems to know a lot more then she does. But there is even more past hiding than she realized.