When the apocalyptic flood arrives, Huang Tang and his companions, including Cao Xingyun, Cai Lin, and Xiao Xianxian, are trapped in a high-rise building, fighting to survive. Using a system that lets him draw cards and combine treasure chests, he gathers supplies and upgrades their shelter. Through mysterious portals, he explores different instances, including a goblin island, and battles monsters such as merfolk and goblin shamans. By acquiring survival coins and planning for the long term, he leads his team steadily through a world full of deadly dangers.