Pan is a world where power rules. Where people live in cities surrounded by wastelands. In these wastelands, rifts open, which bring torn out pieces of other worlds to Pan, with the monsters living in them. But sometimes they bring people with them. Here they are called migrants. The task of migrants is to fight monsters and close rifts. So I am one of these migrants and just appeared on Pan. The only thing I have is a name. I am Leo. And I will conquer this world.