In the woods of a small town, Adam, a nine-year-old autistic boy, is discovered next to the body of his classmate. They both wandered off from the school playground several hours earlier, and now police are relying on Adam as the only witness to an appalling crime. But he can't tell the police what he saw -- or what he heard. Barely verbal on the best of days, Adam has retreated into a silent world that Cara, his mother, knows only too well.