Ten years after she was separated from her family, an eighteen-year-old orphan with vague memories of the past sets out to Paris in hopes of reuniting with her grandmother. She is accompanied by two con men, who intend to pass her off as the Grand Duchess Anastasia to the Dowager Empress for a reward.
An orphaned brontosaurus named Littlefoot sets off in search of the legendary Great Valley. A land of lush vegetation where the dinosaurs can thrive and live in peace. Along the way he meets four other young dinosaurs, each one a different species, and they encounter several obstacles as they learn to work together in order to survive.
A young man finds out that he holds the key to restoring hope and ensuring survival for the human race, while an alien species called the Drej are bent on mankind's destruction.
