Scarlet acid rain suddenly fell all over the world, cities were reduced to ruins, strong acid corroded metal, mutated creatures roamed the streets, and human survival became a mystery.
Lin Chen, an ordinary social worker, hid in an underground safe house built half a year in advance, but was bound to the "Doomsday Supply System" at the first second of the disaster - automatically generating basic supplies every second, taking in survivors and unlocking weapons, medicines and even superpower enhancers.
When the once-out-of-reach company goddess, neighbor sister, and retired policewoman knocked on the door of the safe house, Lin Chen looked at the supplies in the warehouse and handed over the key with a smile: "Food and housing are included, but you have to guard the house with me."
