the dark hour

Alice Williams is your normal highschool girl in her little world and all that blah blah blah. But one day, specifically the begining of summer just about. She has to spend the whole rest of her break with old grammie and gandie. Her really weird and suspicious grandparents. It's not all that bad, I mean she is going with her little brother Jacob and he is about fourteen and very tall for his age so she will be fine..... Right?