Artisanal tofu maker Xie Yuanqiang insists on using Northeast soybeans, stone-grinding, and brine to make tofu. He is misunderstood by the villagers for raising the price by fifty cents due to rising soybean prices. Outlying vendor Zhao Laosan uses soybean powder, whitening agents, and gypsum to blend inferior tofu, seizing the market with low prices and even counterfeiting his brand for profit. Xie Yuanqiang would rather dump leftover tofu than drop his quality, ultimately gathering evidence to investigate and punish Zhao Laosan's gang through legal and market regulatory departments, guarding the bottom line of an artisan.