Before the black snow arrives, the protagonist unexpectedly returns to two months before the apocalypse, armed with tens of billions in assets and a mysterious spatial dimension. She frantically stockpiles supplies. After the apocalypse breaks out, she leads her best friend, a future researcher, a mutated black bear, and a red-umbrella mushroom in their struggle to survive at a base. She exposes those who steal credit and resists oppressive rules. The team retreats from Lanhai to Zhucheng, foils a conspiracy at a research institute, quells an underground contamination crisis, and saves the base by blasting an entrance shut. Along the way, they obtain clues involving old belongings from a shipwreck, a ruby pocket watch, Q-07, and Base Three. Ultimately, everyone leaves Zhucheng and sets out to find a new home.