When Hannah's parents took her to a new school, they said it was to give her a new start. However, Hannah is 11, autistic, and due to her condition, unable to speak. She had a twin called Angel, but when Angel died, Hannah was forbidden to grieve by her abusive parents, and punished her when she sought comfort from her sister's things. So now Hannah lives locked inside a silent life of despair, which she fears, will soon end at the hands of her parents. However, when a knife keeps appearing under her pillow, and a voice that she thinks is inside her head, won't leaver her alone, Hannah begins to realize that just maybe, she may have an ally not of the world, but fear paralyzes.