The PAW Patrol crash land on an uncharted tropical island filled with dinosaurs after their ship gets caught in a mysterious storm. They meet Rex, a pup who has been stranded for years and has become an expert in all things dino-related. When the Patrol’s archrival, Mayor Humdinger, begins recklessly mining to exploit the island's natural resources, he inadvertently causes a huge, dormant volcano to erupt. The pups are thrown into a series of high-stakes, dino-sized rescues bigger than anything they’ve done before, as they must stop Humdinger before everything on the island goes extinct.