The company cafeteria suddenly raises its meal price to an exorbitant 40 yuan. After the boss's brother-in-law, Liu Fu, takes over the kitchen, the food becomes appallingly poor in quality. Su Man, an ordinary employee, brings her own homemade tomato-and-beef-brisket rice bowl to work, costing less than 10 yuan to make. Her recipe quickly spreads, sparking a company-wide trend of bringing homemade lunches and causing cafeteria business to plummet. Liu Fu resorts to increasingly underhanded tactics to suppress her, including banning microwave use and fabricating evidence to falsely accuse her of profiteering. Su Man joins forces with her colleagues to investigate the kitchen's hidden misconduct. After gathering evidence, they anonymously report the wrongdoing to headquarters, bringing down the entire network of nepotistic interests. All the wrongdoers receive their punishment, while Su Man earns an exceptional promotion through her courage and determination, achieving a remarkable career turnaround.