A strange fog has quietly enveloped the world, followed by a series of "weird rules" that cannot be explained by common sense. Every country has received a warning from an unknown being: rules have been set and those who violate them will die. In order to deal with this unprecedented crisis, various countries have selected "chosen ones" to enter the area shrouded in rules and find ways to crack it.
At the same time, the outside world is not monolithic. Some plutocrats and radical organizations are trying to seek personal gains from this crisis. They secretly bribe informants and pass wrong instructions to the "Chosen Ones" who enter the danger zone, just to get the mysterious power that may be hidden behind the rules first, regardless of the consequences that may lead to global destruction. And... How will this global crisis be resolved?
