Su Xiaoxiao awakens in the 1970s, drowning in poverty—ration cards determine survival, markets sit barren, and her family of six barely scrapes by on two salaries. Her grandmother schemes to marry her off to the village chief's intellectually disabled son for a mere two hundred yuan, as coarse sorghum remains an unattainable dream. Fortune shifts when Xiaoxiao discovers an impossible lifeline: a mysterious "time-trading" app linking her smartphone to 2024. She seizes the advantage, purchasing bulk commodities—cooking oil, canned goods, light bulbs—from the future and reselling them at 1970s market rates, banking the profits. Each transaction generates "time-credits," a currency she converts into fresh inventory. While others languish in stable but suffocating jobs, barely affording meals, Su Xiaoxiao's household ascends to county wealth through the derided individual economy. What begins as survival transforms into an empire, built one illicit trade at a time.