A stranger comes to a fishing village, which plans to catch lots of fish through poisoning the river.  As the villagers debate, they are warned against this by a traveling priest. A fisherman saves a little turtle and is taken to an undersea palace. Two boys go to ask the fire god to help them with a demon who's been raiding their village.
Once upon a time, 
high on Mt. Iwata,
Érase una vez hace mucho tiempo,
Hace mucho, mucho tiempo,
Era uma vez, no alto do Monte Iwata,