Lin Feng, a bottom-tier delivery driver in Jiangcheng, suffers repeated setbacks in his career and love life. In a desperate situation, he accidentally discovers that the wardrobe in his rental room is a dual-passage door connecting reality and the doomsday wasteland, while simultaneously awakening an upgradable safe space—doomsday death can automatically reload reality, and only the supplies inside the safe can be brought back undamaged. Relying on cross-border shuttle running to loot gold, genetic potions, and future technology, he slaps the faces of his gold-digging ex-girlfriend in reality, fights off dark and evil forces, and rapidly accumulates hundreds of millions in wealth; in the doomsday wasteland, he subdues survivors, builds a combat team, fights all the way against local gangs and the evil organization Skynet, and grows from an ordinary person who cannot afford rent into a legendary cross-border profiteer and survivor leader.