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?

Ten years ago, Kyutaro's beloved Fuyu disappeared--and now Fumi must decide if she should let Fuyu resurface! The problem is that only one of them can remain by Kyutaro's side... As Fumi faces this difficult decision in the depths of her own mind vault, will she choose to disappear?