When her tribe, the Blackfoot, captures a horse from their enemy tribe, the Snakes, Kit Fox knows she must find a way to ride it. But the tribe elders and warriors don't want help from a girl -- all they wish is for her to become the co-wife in her sister's marriage. Refusing to be deterred, Kit Fox learns to ride in secret. When the Snakes attack, she must decide if she has the courage to reveal the truth and prove herself to the tribe.