On the Western continent ravaged by werewolves, Elowen Veyra—an orphan purchased from an Eastern port by a High Witch in exchange for rare spices—faces her 18th-year full moon night. As a novice witch, she must hunt and sacrifice a werewolf to the Moon Goddess before dawn, or suffer divine punishment. Her gift defies convention: she transforms bitter potions into intoxicating elixirs, wields a silver chalice as her sacred tool, and is accompanied by a noisy yet loyal snow-white goose familiar.