Kaya knows in her heart that her beautiful Appaloosa mare, Steps High, is the fastest horse in the herd. But when boasting leads to a daring bareback race, Kaya pushes Steps High too hard. She puts herself and the horse in danger and earns a terrible nickname for being untrustworthy.
Kaya vows to be a girl her horse and her people can trust. When enemy raiders storm Kaya's village, she tries to save Steps High but gets taken captive herself, along with her sister. All Kaya can think of is escape, but how?