The long-awaited rains finally return to Pteranodon Terrace, but grow into a huge rainstorm that grows even bigger - into a hurricane! Dad hasn't seen it blow like this since he was a kid. They seek shelter, and Don discovers an entrance to a cave below their nest, where not only the Pteranodons, but also their other neighbors, the Lambeorsaurus family and Cindy Cimolestes, all take shelter for the night. In the morning, the storm has passed, but everyone must pitch in to rebuild their various nests. The family is cleaning up the mess left over from the hurricane, and discover that a raft of logs has washed up two refugees from across the Western Interior Sea - a turtle named Aidan Adocus, and a small mammal named Tommy Ptilodus. Our family learns of their adventure, crossing the sea in the storm, and washing up at Pteranodon Terrace. They decide to take their new friends to the Dinosaur Train, and ride back with them to their home in Appalachia.