In the year of 1730, as the era of witch trials in Switzerland is reaching its end, Kathryn Walder, a clever young apothecary, helps her father run a pharmacy in the beautiful lake town of Rose City. But Kathryn is hiding a secret. Her remarkable success in curing her patients is not thanks to ointments or herbal remedies. Kathryn has the divine power to heal. After her father temporarily leaves the pharmacy in Kathryn's hands, her otherwise quiet and orderly life is overturned with the arrival of a charming hunter, Johann Jäger. But before Kathryn can make sense of her budding emotions, a ruthless witch prosecutor, determined to accuse of sorcery any woman who inflames his desire, sets his eyes upon her. As suspicion closes in and danger stalks her every step, Kathryn must decide how far she will go to protect her secret-and the hunter who's captured her heart.