Danger and action abound after Akira Sengoku and his classmates crashland on a deserted island while flying home from a class trip. The island doesn't exist on any maps but that's not even the strangest part: the animals they find on the island are prehistoric beasts that are supposed to have been extinct for thousands of years! Now Akira and his friends are in danger as the island's residents start eyeing the humans for their next meal. Will they ever solve the mystery of the island and find their way home?
Sengoku has a plan to infiltrate the mad doctor Nishikiori's camp, but things backfire and Sengoku and his crew are sent on what may be a suicide mission to explore deep inside the mysterious pyramid. As they explore the treacherous depths of the pyramid, they make new discoveries but as always, just as the mysteries of this island begin to reveal themselves, Sengoku and his crew encounter more questions than answers. What incredible and inexplicable things will they find next in the deepest regions of this puzzling pyramid? From the Trade Paperback edition.