Luke Fitzpatrick is a skinny, not overly bright 12-year-old growing up with a much cooler older brother and sister in the wealthy Australian suburb of Turramurra. Each day, he puts up with teasing from his siblings, taunts from school bullies, and exasperation from his teachers. And now his parents appear to be on the brink of divorce. It's all too much for Luke, who runs off to the nearby Ku-ring-gai National Park to prove that he is both brave and...