Twin sisters die miserably in the doomsday, and are reborn into the Dayu Dynasty before a drought, carrying a two-way spacetime space. She travels back and forth between modern times and ancient times, exchanging wild mountain delicacies for fair-priced grain and cold-weather supplies, and unites with Zhou Nuan to open a fresh goods store to stabilize cash flow. She drives the whole village to gather mountain goods in exchange for modern supplies, acquires a dock bun shop and a street-front fabric store, and improves high-yielding rice to benefit villagers and neighbors. Along the way, she is waylaid by Yang Yaozu and Biao Ge, gets help from a homeless big guy, and uses her scholar uncle's power to have the villains sentenced to be beheaded immediately. She builds a guard unit, opens up multiple business lines for poultry and embroidery, relies on financial and martial might to protect her whole family and villagers, and defies heaven in troubled times to hoard goods, build industries, and avoid disaster.