Three days before the cold wave apocalypse, Lin Wan's AI project suddenly activated, centered around her future self who survived the apocalypse ten years later—returning with all the memories of the disasters. Without hesitation, she spent all her savings to empty out ten supermarkets and three freezers, transformed her detached suburban courtyard into a steel fortress protected against extreme cold and looters, and picked up her son from her hometown in advance. She remembered the grudge of freezing to death outside her door in her past life; she remembered the smiling faces of her fiance Shen Ji and best friend Wen Man as they locked the door; she remembered the shameless faces of her hypocritical neighbors trying to take advantage; she remembered the ruthless cruelty of the ruffians coming to loot.