For a bat, the cave is a native house, but it can also become a trap, as happened in Intense Bat Rescue. Your heroine is a bat, as usual, flew out with the onset of twilight for hunting. She was unsuccessful and the mouse returned home upset. Apparently this played a fatal role. Instead of its native cave, the mouse flew into someone else and fell into a trap. There, too, the clan of mice lived, it did not get along with the one to which our heroine belonged. Naturally, the mouse was met hostile and put under the castle. Help her get out in Intense Bat Rescue.
