Four years ago, Kannagi Kazuma lost to his cousin Kannagi Ayano in a contest for the right to inherit Enraiha, a sword passed down through the Kannagi family. His defeat, combined with his lack of talent for Enjutsu (the fire arts, which are also the Kannagi Clan's specialty), led to his banishment from the family. Now, Kazuma returns as Yagami Kazuma, a skilled master of Fuujutsu (the wind arts). At the same time, a series of murders at the Kannagi residence, committed by a powerful Fuujutsushi, casts suspicion on him.