Fumi Nishioka lives with Kyutaro Horikita and his family of "Sweepers," people who specialize in cleaning the minds of those overcome by negative energy and harmful spirits. Fumi has always displayed mysterious abilities, but will those powers be used for evil when she begins to truly awaken as a Queen?

At Seichi, the Holy Ground of the Old Byakko Clan, a dangerous ghost attacks and seriously injures Kyutaro! Is Fumi strong enough to heal him? And what sort of secrets will Takaya reveal to them about their past?