Technical worker Gu Tiefeng works through the night repairing the production line, saving the factory millions in losses. Yet the next day, the factory director fines him 3,000 yuan simply for drinking a sip of water in the workshop. Deeply disappointed, Gu Tiefeng decides to follow the factory rules to the letter, clock out on time, and never do more than his assigned duties. After that, one factory crisis follows another, leaving the director and supervisor Liang Ao helpless. They can only beg him to step in. Gu Tiefeng sets his conditions: a public apology, a refund of his fine, and an additional 300,000 yuan expert fee. In the end, he exposes the truth about Liang Ao colluding with outsiders to install a virus, saving the factory. The director abolishes the unreasonable factory regulations, and headquarters hires Gu Tiefeng as a technical consultant with a generous salary. At last, the dignity and value of technical workers receive the recognition they deserve.