The peaceful realm of Narnia faces a final, devastating conflict. An impostor Tash, disguised as Aslan, is introduced, sowing confusion and opening the gates of Narnia to Calormen invaders. Aslan's return heralds a dramatic end—the land is judged, true Narnians are separated from impostors, and a new, eternal Narnia is revealed. The “last battle” brings closure and renewal to the entire series.