RWBY is set in a modern world full of supernatural powers. The main characters are four girls with their own special abilities and weapons. They come together for various reasons to form a team and receive training to fight monsters, villains or other similar groups. Before this series, humans launched a war against the dark beasts (Grimm) in order to survive, until they discovered that "Dust" could be used as a source of magic, which allowed humans to fight against them and build a civilized world.