Destitute post house courier He Zaosheng opens a night eatery at the wharf, exclusively serving hot meals to struggling laborers. Manager Hou mixes in sand to raise prices and uses spoiled meat, treating laborers like beasts. Zaosheng sets rules: hot soup is always available, prices don't rise on rainy nights, and those without money can pay later; the laborers all follow him. Manager Hou cuts off water and firewood, frames him with malicious tricks, and tries to force him to his death on a stormy night. However, hundreds of wind lanterns light up together, and hundreds of laborers rush through the rain, setting up stoves for him across the wharf. An undercover magistrate from the capital, holding a billing ledger, instantly takes down the black-hearted giant merchant. No matter how dark the sky gets, there is always someone who leaves a lamp lit for the people working themselves to the bone.