The Paw Patrol gets caught in a storm and crash-lands on an uncharted tropical island inhabited by dinosaurs. Here they meet Rex the puppy, who has long been on the island and has become an expert among the dinosaurs. However their foe, Mayor Humdinger, recklessly begins resource extraction, which leads to the awakening of a sleeping volcano. Now the Paw Patrol must save the island and its inhabitants from the looming disaster.