Assembly worker Lin Yuan kindly subsidizes and cooks for his roommates, only to be falsely accused of making a profit on the price difference, leading to a complete fallout between both sides. Credulous and greedy for cheap things, the roommates consume substandard fast food, causing severe food poisoning. Driven by jealousy and desperation, they resort to arson for revenge and ultimately end up in prison. With superb skills and a steady mindset, Lin Yuan steps up during a production crisis, rising all the way to workshop management and using his strength to prove that kindness needs to have a sharp edge, and a baseline can support a life.