Twelve-year-old Bree McCready has a mission: she has just one night to save the world! It starts when a clue inscribed on a Half-Heart Locket leads Bree and her best friends Sandy and Honey to an ancient magical book. With it they can freeze time, fly and shrink to the size of ants. But they soon discover the book has a long history of de­struction and death. And it's being sought by the monstrous Thalofedril, who will stop at nothing to get it. Using its incredible powers, he could turn the world into a wasteland. Bree, Sandy and Honey go on the run—hurtling off city rooftops, down neck-breaking ravines, and through night-black underground tunnels—to keep the book out of his lethal hands. Little do they know that the greatest danger of all lies ahead, in the heart of his deadly lair... Can Bree find the courage to face this terrifying evil, and to confront the secrets of her tragic past?