Su Xiaoman, a modern agricultural science student, travels back in time to the ancient frontier outpost of Qingshi Pass. Her modern belongings and agricultural knowledge seem completely out of place in this unfamiliar world. After being given a hard time by a local farmer, Qian Mancang, the two make a wager over their autumn harvest yields. She improves the soil, creates bamboo-tube drip irrigation, solves the frontier's drought and grain-supply problems, and cultivates high-yield crops. A young girl named Xiao Ya discovers that something about her is unusual. After learning her true origins, Xiao Ya keeps her secret faithfully. When autumn comes, Su Xiaoman wins the wager and leaves behind a complete collection of farming techniques and agricultural books before returning to the modern world through a rift in time and space. A thousand years later, an archaeological team excavates the farming book at the ruins of Qingshi Pass, preserving this extraordinary farming story across time.