Dangerous task! Fix the dragon pulse!. Rinrin and Tenshin follow Meirin and her friends to a shrine in a cave. However, they are chased by a swarm of rats and bats, and find themselves in big trouble. In the end, they fall into the river that runs through the cave and are swept away. At the same time, as Meirin and her friends walk through the cave, a railroad track begins to move like a snake and suddenly attacks them. While Asuka and the others are struggling, Meirin advances towards the source of evil energy alone and is reunited with Rinrin and the others...