The pups go into a tunnel in Jake's mountain to go into a world of dinosaurs, where they meet a dino expert pup named Rex and his owners, Dr. Turbot and her daughter, Taylor Turbot. However, Mayor Humdinger has followed the PAW Patrol into the world and decides to take dino eggs back to Foggy Bottom. It is up to the pups to get the baby dinosaurs back to their mothers on a Dino Rescue.