Shen Qingsui, who has transmigrated into a book, is publicly dumped by her fiancé and rejected by the prominent clans. She takes an unconventional approach to transforming saline-alkali wastelands, discovers underground waterways connecting to the Western Regions, and uncovers precious iron ore resources. Jealous of her success, Lin Wan'er secretly bribes a bookkeeper to fabricate evidence in an attempt to destroy the Shen family's trading business. Having prepared in advance, Shen Qingsui retains all the necessary records and supports Lu Du, who commands the troops on the northern frontier. Together, they thwart schemes from multiple sides and secure an exclusive trading concession from the imperial court through their industrial achievements, bringing prosperity to the border troops and civilians.