Jack (Gheghi) always wanted a little brother, and when Gio (Sisto) is born, he believes his parents when they tell him that Gio is a superhero with amazing powers. As he grows up, however, Jack realizes that his brother actually has Down syndrome, a condition that Jack decides to keep secret from his high school friends. When the truth comes out, Jack learns that his brother's energy, vitality, and unique perspective can indeed change the world - just like a superhero.