Two Yin and Yang teacher's house "people of thunder" and "Tsuchigumo families" which protected Japan from ancient times. However, the person of Tsuchigumo plotted overturn in Japan by black art. The thunder whole families approach only human being, Tomoe (the small light) inheriting the blood of both families to save this country. "Only thou breaks what can protect a country"! Tomoe who lived as normal Schoolgirl is puzzled over one's fate.
