Miss Mildred Percy, former wallflower and current adventurer, is now in charge of a dragon. Along with Mr. Wiggan and Mrs. Babbinton — our stalwart companions from the first volume of Miss Percy’s adventures — she embarks on a journey across Wales, in search of the mysterious Nyth y Ddraig, or Nest of Dragons. But traveling with a young dragon in an unfamiliar land proves more difficult than anticipated. Between angry mobs, midnight rescues, and recalcitrant sheep, they battle (figuratively) their way across the countryside, defend themselves against enemies old and new, and discover something remarkable hidden in the mountains of Wales.