What if the asteroid that forever changed life on Earth missed and giant dinosaurs never became extinct? In this epic journey into the world of dinosaurs, an Apatosaurus named Arlo makes an unlikely human friend. While traveling through a harsh and mysterious landscape, Arlo learns the power of confronting his fears and discovers what he is truly capable of.

When a young boy named Jake accidentally makes a new friend in an experiment gone wrong a troubled town is plunged into chaos. But with the creature rapidly evolving every day, Jake finds it increasingly difficult to keep his new pet secret. Jake's friends and new girl Abbie realize they are not the only ones interested in this strange, mischievous little dinosaur and soon discover that the only thing more mysterious than what it is, is who is looking...