Simon is an American exchange student studying in Japan. He is ignored by students but performs well with only a few bad records. He is fascinated by dinosaurs and often reads on them in his free time. He silently wishes that he could see a living dinosaur but shrugs it off every morning he wakes up. One day when a mysterious force brought his school bus and class to another world. Simon finds out this world is filled with the dinosaurs and other prehistoric creatures. Simon's fascination is short-lived as the class gets attacked by Carnivores and when Simon is knocked out and wakes up alone. It is up to him to find and reunite his class while avoiding and surviving the world around him. Will Simon find his classmates or will they face extinction.