Meteors fall from the sky, and the end comes. Shi Ziran and his sister Shi Ziqing were trapped in the ruins of the city, but accidentally activated the "Doomsday Fortress System". While others were still struggling for a bite to eat, he had already driven a mobile base vehicle that could be upgraded and evolved, and built his own steel fortress in the wasteland. But the first mission released by the system was to go to the most dangerous nuclear pollution area in the city...
