The Horse and His Boy is set in the time of King Peter the Magnificent during the Golden Age of Narnia.
The story takes place during the reign of the Pevensies in Narnia, an era which begins and ends in the last chapter of The Lion, the Witch and the Wardrobe. A talking horse called Bree and a young boy named Shasta, both of whom are in bondage in the country of Calormen, are the protagonists. By chance, they meet and plan their return to Narnia and freedom. Along the way they meet Aravis and her talking horse Hwin who are also fleeing to Narnia.