Around a modern urban construction site, box lunch operator Zheng Shoutian sticks to ingredient quality and the bottom line of operation. Due to an increase in meat costs, he prices the buffet box lunch at twelve yuan, and after encountering low-priced competitor competition, customer traffic drops significantly. After low-priced peer operations cause a worker dining health accident, he is invited to return to the construction site to set up a spot, establishing transparent control mechanisms such as same-day procurement and sample retention publicity, guarding worker dining safety, and standing firm in operational footing with integrity and top-notch quality.