Justin Prentiss and his twin sister Janine are Native American shamans … and they're barely even teenagers! When their grandfather tells them that a buffalo cow has disappeared from the National Bison Range in their home state of Montana, they immediately suspect that Unktehi, the Spirit of Chaos, is up to mischief again. But is the warrior demigod to blame for this unexpected buffalo-napping? Join Janine and Justin as they investigate the mystery with the help of their spirit animals, Thunderbird and Coyote, in this third Prentiss Twins adventure.