A thrilling and epic prehistoric world, where an underdog dinosaur triumphs to become a hero for the ages. During the Late Cretaceous period 70 million years ago, the Alexornis bird Alex narrates about three Pachyrhinosaurus named Patchi, Scowler, and Juniper who grow from infants into adulthood. Alex has a symbiotic relationship with Pachyrhinosaurus. Patchi leads the herd in migrating, and they also encounter the predator Gorgon the Gorgosaurus. Though the film was originally going to lack narration or dialogue, 20th Century Fox executives decided to add voiceovers, believing it would connect audiences to the characters.
