At the Baiwei Street Night Market, Chen Yan, the owner of the Yan's Stinky Tofu stall, raises his selling price due to rising raw material costs while adhering to three ancestral business rules: soybeans are not kept overnight, oil is not used past two days, and accounts are not separated from the heart. This move touches the interests of his competitor, Jiang Pang. Opponents continuously resort to low-price price wars, malicious framing, spreading rumors, and smearing to suppress him. With the help of old neighbors and apprentice Akai, Chen Yan guards the gleaming iron pot and his original intention, publicizing the accounts, exposing the chaos of inferior food, and making conscientious food shine brightly amid the bustle of the market.