With plenty of rest and recuperation, the team pass through a city and arrive around a forest area located by Horned-Owl Mountain. As they near it, Arpon suddenly falls ill by the Monster Flu. They come to a nearby family for aid; in the midst of their troubles, Paifu and Maruyama save them from being attacked by a gang. In exchange, the family cares for the sick Arpon while Paifu, José and Maruyama take off for the forest. Before they leave, they are told by the family of the forest monster's supposed weakness, whistling.