An unexplained global catastrophe suddenly occurred on Blue Star, and blood rained from the sky. Some animals, plants, and humans mutated into bloodthirsty monsters. At the same time, various time and space cracks appeared on the earth, connecting dangerous other worlds and escaping special energy (spiritual energy, dark energy, etc.). The order of modern civilization collapsed, human beings fell into an existential crisis, and some human beings began to awaken various supernatural powers.
