Professor Tsuchida, a leading expert on archaeology, goes on an unauthorized expedition into the unknown lower levels of the Great Pyramid of Giza with his assistant Kōji Kuroe. They soon realize that the underground ruins is full of death traps when the excavator they hired is decapitated by a thin metal wire. Professor Tsuchida, unwilling to back down, goes outside the pyramid to lure a Japanese tour group nearby to act as his human shield. Inside the pyramid, one by one, the members of the entourage become subject to Khufu's punishment for their faults, but the professor insists on heading deeper into the complex despite knowing the fatal dangers of the environment.