January, 1st. The cataclysmic day is coming, the underground core beasts are pouring out, the sun light spots are exploding, the cold current of -100 degrees has swept the world, the prehistoric monsters have reappeared, and alien creatures have descended on the earth! What will greet humanity will be a reckoning, but also an opportunity for evolution! …… December, 24th. Seven days before the outbreak of Cataclysmic Day, Chen Nuo, who had already died during the cataclysm, returned to this point in time and activated the "Cataclysm System"! Set up your own shelter and upgrade it infinitely. Not only that, but he can also buy high-tech equipment with ultra-modern technology, and even cultivate immortals! …… While everyone was struggling to survive during the cataclysm, Chen Nuo had already flown with his sword and came out to forage for food.