When the weather has been extremely dry for several weeks, all the water holes at Pteranodon Terrace dry up. The Lambeosaurus family decides to move away in search of water, which upsets the kids. Dad and Mom decide to take the kids to the Big Pond on a camping trip, where they will wait out the drought and return home when it rains again. Don doesn't want to leave his home, even temporarily, and decides to perfect a "rain dance" that will make the rain return.