Nine-year-old Nina has grown up with the stories from her Lipan Apache grandmother about shapeshifting animals from the Reflecting World who visit the human world. In fact, her father runs a bookstore that caters to the animal visitors. When Oli, a cottonmouth from the Reflecting World discovers that his frog friend Ami is ill, he travels to the human world to seek help. There, he meets Nina who helps him diagnose what is going on with Ami, while Oli helps Nina tackle the strange circumstances surrounding her grandmother.