Kyoshiro rescues Shizu who was being abused by her husband, even since she had been violated by the man posing as Ieyoshi. He then learned that Ieyoshi had been acting oddly ever since returning from Kyoto six months ago. Sir Fumiya's investigation of the O'oku (Shogun's harem in Edo Castle) uncovered the plot and reported that Sir Higo-no-Kami had been controlling the fraud. That's when Kyoshiro heads to Kyoto to find clues...

Third installment of the "Gakko No Kaidan" series follows the trek of several elementary school students as they wander into an alternate world that exists on the opposite side of a school mirror. Nishida Naomi (the hapless teacher in "Gakko No Kaidan 2") returns as the teacher who accompanies the children on their journey into the surreal universe.