東京郊外にある街。 その街の小高い丘の上に、小さな公園があった。 そこでいつも一緒に遊んでいた小さい頃からの仲良し６人組。 しかし４年生の時に、それぞれが転校する事になってしまった。
This movie starts with Saze X playing basketball. Suddenly, a lightning bolt hit the earth. They walked towards it and found a boy. The boy's name is Ricky, and he thinks he has forgotten everything. On the other hand, Remy told Sazer-X that a giant monster named Mechanical Giant Bulgario had approached Earth and was destroying buildings. Sazer X still defeated the monster. But then something flashed into their eyes, and Takuto mistook it for a cosmic capsule. In fact, this is the Bosquito people that exist within Bulgaria, which Professor Horiguchi later explained.
然而当他们举行完仪式，奇怪的事情发生了，教室突然猛烈摇晃起来，一阵巨响后地面轰然坍塌，所有人都掉了进去。 等他们醒来后，发现自己身处一个古旧的小学校舍里，这所废弃学校门窗紧闭，恐怖诡异。直美发现了昏迷的世以子，二人随后一起行动，企图离开这个可怕的校舍。但是更可怕的事情在后面等着她们，受害者一个个地出现。在这所名为“天神小学”的古老学校里，究竟是谁操控着这一切……
