Frank loves soccer, codes, riding his bike, and playing with his friends. His brother Max is five. Max only eats foods that are beige or white, hates baths, and if he has to wear a t-shirt that isn't gray with yellow stripes he melts down down down. Max is autistic, and Frank longs for the brother he was promised by his parents before Max was born -- someone who was supposed to be his biggest fan, so he could be the best brother in the world. Instead, Frank has trouble navigating Max's behavior and their relationship. But when tragedy strikes, Frank finds a way to try and repair their fractured family and in doing so learns to love Max for who he is.