Kazuma Kannagi was considered useless within his family because he could not use Enjutsu, the power to control flames. When he was defeated by Ayano Kannagi, one of his relatives, in a bout to decide who the wielder of Enraiha, a sword that was wielded by the family heir, he was banished from the family. Four years later, he returns, now a master of Fuujutsu, the power to control wind, with a new name: Kazuma Yagami. Soon after his return, he is reunited with Ayano and his younger brother, Ren, who is also gifted in Enjutsu. Soon, however, Kannagi family members are killed and the murder weapon is revealed to be Fuujutsu. Now Kazuma has to fight his family to prove that he is not the murderer.