After a fellow student mysteriously disappears during an after hours game of hide and seek in the elementary school building, the rumor mill amongst the students begin churning out all types of fantastic theories, many of which involve the well-known local legend of Hanako-san or the sad tale of Taichi the sickly student who died without the childhood enjoyment of having any true, close friends.
When a few brave students decide to investigate things on their own, VERY late at night, they discover an ominous and foreboding mirror one of their favorite teachers had pulled out of a locked and forgotten storage room (the lock of which mysteriously fell to the floor as the teacher was following some strange phenomena!!) and placed on the classroom wall. As the children peer into the mirror, one by one they are violently sucked into it by a ghostly hand.
And then the rumors REALLY start, finally causing the teacher herself to demonstrate to her fearful students that the mirror is harmless. But of course you know her best (and adult-naive) intentions goes horribly awry… (!!)
Thus the entire lot of six students and one humorously cocky female teacher find themselves in a paralleled mirror universe where all things normally good are now maliciously evil and life-threatening.
Amidst the amazingly diverse world of rather scary entities they encounter, one proves to be more empathetic than the others, the ghostly Taichi whose deadly power swings them from hopes of rescue to eternal damnation in Hell.