Once upon a time, the country Rain was famous for its jewelry craftsmen, and its landscapes could impress any guest. But one day in the afterlife world, a fierce struggle began between demons for the right to own the throne. Due to the feuds of demons right in the center of Rain, a rift opened into the afterlife world, which turned everything around into ruins. The corruption from the rift was so strong that the surviving inhabitants of the surrounding area forever lost the ability to use ordinary magic – from that moment they could only wield demon magic. Now the guild "Silver Cats" is trying to restore the world to its previous state, and the son of the guild master was chosen as one of those who are able to restore the world.