A girl from the forest enlists at Pennyroyal Academy, where princesses and knights are trained to battle the two great menaces of the day: witches and dragon.There, given the name "Evie," she must endure a harsh training regimen under the steel glare of her Fairy Drillsergeant, while also navigating an entirely new world of friends and enemies. As Evie learns what it truly means to be a princess, she realizes surprising things about herself and her family, about human compassion and inhuman cruelty. And with the witch forces moving nearer, she discovers that the war between princesses and witches is much more personal than she could ever have imagined.