Feeling lonesome and missing her sister and her horse who were captured by enemy raiders, Kaya befriends a dog that has wandered near camp. Although others warn her not to trust the animal, Kaya senses something different. Then, an annual gathering makes Kaya hopeful of her sister's return, and a group of hunters bring news of horses running wild in the mountains. Will this summer bring the happy reunions Kaya's tribe is hoping for?