Grain prices at the frontier skyrocketed, leaving the common people in agonizing distress. Zhou Mancang, who came from a refugee background, opened a grain store and firmly upheld his conscience by selling fairly priced grain, yet he faced multi-pronged suppression and plotting by the monopolistic grain merchant, Boss Zhang. Relying on his integrity and wisdom, he broke through rumors, blockages, and conspiracies to open up the grain routes. When a severe snowstorm struck, Zhou Mancang exhausted his grain reserves to open granaries and save the frontier, stabilized grain prices, protected the frontier's soldiers and civilians, and forged a legendary tale of a righteous merchant.