With the evil in the south raging and preparing to strike, Swanwhite looks for help with King Rynard who rules Narnia's neighboring country Archenland. In order to reach Calormen undetected, they must cross the vast and treacherous desert. As the two kingdoms unite against their common foe and ride out to confront it, what will Swanwhite be tempted to sacrifice? Which of the three kingdoms will triumph in this great uprising, and which will fall?