66 million years ago, before there were humans, settlements, and vehicles, planet Earth was home to animals known as dinosaurs, pterosaurs, and sea creatures. In a place called the Rocky Land is the home of five young dinosaurs: A male Apatosaurus named Louise, a male Chasmosaurus named Cassie, 2 Pteranodon siblings called Paty and Daniel, and a male Stegosaurus named Stellar.