While fitting in the air pocket and connecting the broken wire of Kunii on the wings, they managed to drop bricks and five-inch nails onto the German trenches from above to scout the fortress. However, the enemy plane flies there and battled them. In contrast to the Taube, who is armed with a , the Mo-style plane has only a for self-defense, and Taube, who provokes in , is forced to disperse. After that, the squadron set up a base on near the bay to prevent the danger of entering the base. Osugi responds to the request of the islanders, such as Yang Hakurei, the girl dancer Maki saved her from the predicament at a . However, a bottled letter reveals that the islanders has a spy among them. 