In a small northern city in the 1980s, laid-off worker He Shan set up a food stall selling saozi noodles for thirty fen a bowl, only to face malicious competition and false reporting from peers, branding him a black-hearted vendor. Faced with public misunderstanding and heavy life pressures, He Shan stayed true to his original intentions, guarding his operational bottom line with a ledger recorded on cigarette box paper. He later moved to a construction site to run a canteen, winning the trust of his fellow workers with genuine craftsmanship. As past misunderstandings gradually unraveled, He Shan rejected empty fame and worked steadily, interpreting the value of honesty and trustworthiness through a bowl of hot noodles, while setting an upright example of character for his daughter Xiao Xing.