Song Yuning, the owner of a bankrupt two-yuan shop, unexpectedly travels through time to a poor farming family in ancient times, bringing along a personal space stocked with affordable everyday essentials. Determined to turn over a new leaf, she changes her former self's wicked ways and lovingly cares for her frail younger sister and mother. Using novel items such as plastic mirrors and portable medicines to earn money for daily expenses, she also introduces superior seeds and chemical fertilizers, teaches scientific vegetable-growing techniques, and leads the entire village in developing a thriving fruit and vegetable industry. She uses modern physical therapy equipment and acupuncture models to help the village physician improve his medical skills and relieve the villagers' chronic bone pain. After opening a shop in the capital, her practical everyday products become fashionable among the wealthy and powerful. She also cleverly resolves political disputes at court and exposes unscrupulous merchants who monopolize supplies and hoard goods for profit.