A pair of teenage half-brothers,Karl and David Scott,are on a flight with their father on his private plane when Karl takes over the controls,allowing his father to fall asleep. After flying into a storm,Karl struggles,causing Frank to retake control before it crashes into the ocean. Frank saves his sons,but had trouble escaping the crashed plane as his seatbelt failed to release. Karl and David wash up on the shore of a large uncharted island. Looking for help,Karl and David meet a man named Cyrus Crabb who leads them to Waterfall City,the capital of Dinotopia,a hidden civilization where human beings and dinosaurs peacefully coexist. In fact,some of the dinosaurs,notably a neurotic,but friendly Troodon named Zippo,possess human intelligence and speak perfect English. Among the many rules in Dinotopia is the edict that,once an outsider arrived,he or she was never allowed to leave.