'Humans what disgusting creatures' that is what the inhabitants of the Vaults (Dungeon) think, but after the death of The Vault Lords' wife they are forced to try to subjugate the human world, since it was them who committed the crime of killing an inhabitant of a Vault, and since they did that they will have to pay for it with their freedom, all while new and old inhabits have to learn to coexist and become friends Or More.