Humans around the world are assigned independent safe rooms. Outside the door is endless nothingness, and alien beasts appear randomly. All food, medicine, and equipment can only be obtained by opening the door and hunting monsters.
Chen Mo, who was reborn with three years of memories of purgatory, spent all his assets to hoard supplies in advance, took advantage of everyone's panic to score the first kill in the world, and exclusive use of rare buff skills.
Knowing the monster's weaknesses and secret opportunities well, he developed strongly along the way, gathered survivors to establish a territory, and rebuilt the human order in the cruel nothingness.