The legendary gumiho or
nine-tailed fox, Goo San Daek, leaves her husband after his betrayal renders
her unable to shapeshift. She takes her nine-year-old daughter, Yeon Yi, who
has yet to gain the ability to use her gumiho powers, to a village in order to
protect her. As Yeon Yi turns ten, her physical transformation begins, putting
her in increasing danger of being discovered by her neighbors.