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?
In order to save their sick teacher, Sengoku and the gang commence an alloutwar to kidnap the island’s only doctor, Nishikiori. However, the atrocious doctor uses his brainwashed servants to turn things around on Sengoku and his friends! The kids must think of an even better plan to outwit him, but will they make it in time? As they approach the pyramid for their final strike, the members of Sengoku’s camp must once again take a stand against the nefarious cruelty of Nishikiori and his henchmen…