Chester is bred to be a service dog. But his fear of loud noises makes him unqualified. Gus has autism and his parents hope that a dog will help him with his social skills. At first Chester and Gus have trouble connecting but they soon develop a special bond. Unfortunately, the school discovers they can't really let Chester stay in school but when everyone witnesses Chester's ability to predict Gus' seizures everything changes. Really nice book, heartwarming.