Liu Mancang visits the restaurant run by his son, hoping to taste the organic vegetables he personally grew. Instead, he is confronted with an outrageous bill for three simple home-style dishes, along with a series of additional charges. Faced with snobbish waitstaff and a manager who keeps passing the buck, he refuses to lose his temper. Together with his son, Liu Yi, he preserves the evidence and investigates the truth. As hidden fees, the whereabouts of ingredients, and fraudulent accounts are gradually exposed, the restaurant undergoes a thorough overhaul, makes its prices public, and restores its commitment to ingredient quality.