Shasta is a young boy living in Calormene with a cruel man who claims to be his father. One night he overhears his "father" offering to sell him as a slave, so Shasta makes a break and sets out for the North. He meets Bree, a talking horse who becomes his companion. On their way they encounter Aravis, a high-born girl escaping an arranged marriage, and her talking horse. Despite their differences the children and horses learn to work together to reach the freedom they long for. In the meantime, they uncover a Calormene plot to conquer Narnia.

Shasta is a young boy living in Calormene with a cruel man who claims to be his father. One night he overhears his "father" offering to sell him as a slave, so Shasta makes a break and sets out for the North. He meets Bree, a talking horse who becomes his companion. On their way they encounter Aravis, a high-born girl escaping an arranged marriage, and her talking horse. Despite their differences the children and horses learn to work together to reach the freedom they long for. In the meantime, they uncover a Calormene plot to conquer Narnia.