This is a realistic story about the construction site boxed-meal industry. Apprentice Xu Dacheng uses low-priced membership cards to attract customers and cunningly takes over master Zhou Changshun's shop, but causes a food poisoning accident due to using problematic ingredients out of greed for cheapness. Zhou Changshun and his daughter uphold the bottom line of food safety, partner with Sun Guilan to operate down-to-earth businesses, do not covet large orders beyond their capabilities, and win workers' trust with conscience and craftsmanship, illustrating the principle that honesty is the foundation of doing business and holding fast to one's original intention is the only way to go far and steady.