For sixteen-year-old Witch Hero Green, Nature is everything--home, school, and source of the Divine. So, when a Manhattan developer threatens to raze her beloved Sacred Grove, Hero and her Papa leave the Maine wilderness to fight. While Papa campaigns in New York to save their land, Hero wages a battle of her own: to survive the backbiting and gossip of Stanwyck High, where, it turns out, Witches aren't welcome. She gets help from two very different boys: James, her brooding, handsome neighbor, and Bugbear, the brilliant outcast whose psychic bond with Hero astonishes them both. With bulldozers at the edge of her Grove and the climate reaching a tipping point, Hero realizes that everything is sacred, and nothing is safe. Waking to her power, Hero builds a viral youth movement called Hunker Down. She claims the mantle of High Priestess and embraces the promise of her name, until a family secret threatens to destroy everything she's built.