Honest carpenter Father Lin, carrying his lifelong savings, wants to buy a commuter car in full for his promoted daughter. However, he is maliciously harassed by the black-hearted manager of a 4S dealership due to his plain clothing, and is further framed for scratching a display vehicle, being forcibly extorted for 100,000 in "depreciation fees." Hearing the news, his daughter Lin Min rushes over, using her professional expertise on the spot to puncture the scam of a "transport-damaged accident car masquerading as a new car," and also follows the clue to unearth the entire black industry chain of counterfeit aftermarket accessories and consumer extortion. It turns out that she is precisely the group's parachuted operations director. In the end, all involved personnel are apprehended one by one, the chaotic industry practices are thoroughly purged, and the father and daughter proudly pick up their car and return home, interpreting with their actions the righteous truth of living with innocence and founding a business on integrity.