Zhou Zheng, the owner of a fresh-produce shop, runs his business honestly, but his landlord, envious of his success, raises the rent to force him out. Left with no choice, Zhou restarts his business in a narrow alley. After taking over the thriving shop, the landlord couple engage in speculation and underhanded dealings while maliciously suppressing competitors, only to face legal punishment when their illegal activities are exposed. Zhou Zheng, meanwhile, remains committed to quality and his principles. Through honest business practices, he earns a strong reputation and builds a successful enterprise, proving that sincerity is the foundation of doing business.