They meet Rex, a pup who has been stranded on the island for years and has become an expert in all things dino-related. When the PAW Patrol's archrival, Mayor Humdinger, begins recklessly mining in hopes of exploiting the island for its natural resources, he inadvertently causes a huge, dormant volcano to erupt.
The PAW Patrol 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.
