Stampede! A wildlife crisis in Yellowstone National Park leads the West Yellowstone town council to desperate calling in the Earthcore team, under the suspicion that the mass animal migration has a geothermal cause. Anira, Tiger and friends find themselves stumped at first, and it turns out most of the locals are sceptical of their supernatural gifts—even when presented with evidence. Can the strange magic from New Zealand help get to the core of a very different land—and even help Yellowstone’s very own cryptids to find their way home?