Third volume of the Japanese anime series, set in a world where witches have dangerous supernatural powers, and where the covert STN section tries to hunt them down. Robin is the latest recruit after one agent is killed, her own magic skills quickly marking her out as one of STN's most powerful operatives. In this volume, Robin starts to wonder what the exact difference is between a witch and a Hunter, and she makes the acquaintance of a mysterious woman who could provide her with some answers.