According to his father's letter, Ethan must trek 200 kilometres across the desert to the city of Tunis, with the help of a guide and three other young people. Confused, hungover, and--if he is truthful--more than a little scared, Ethan has no choice. He will face sandstorms, vipers, and agonizingly painful blisters ... but, most painful of all, he will confront his inner demons and come to a true realization of who he really is.