The landlord raised the annual rent of the convenience store from 50,000 to 150,000. Old Xu does not put up with it, bringing his equipment and regular customers to move to the quiet back door. The landlord's daughter seizes the main entrance, grabbing business relying on low prices, internet celebrity snacks, and member recharges, but crashes because of expired goods and unverified commodities. Relying on integrity, service, and rigorous procedures, Old Xu wins the three-year campus service department of the school. When the landlord lowers the rent to beg him to move back, Old Xu only says, what is thrown away is the facade, and what remains is the customers' trust.