This is a documentary story about dinosaurs that inhabited the planet approximately 66 million years ago. The time period covers the Late Cretaceous era. The series features representatives of ancient species such as Triceratops, Deinocheirus, as well as Mosasaur, Ornithopod, Sauropod, and the enormous frog Beelzebufo ampinga. The creators of the project used up-to-date paleontological information. Some dinosaurs are depicted with feathered covering, for example, a young Tyrannosaurus rex.