Fake daughter Jiang Yu suffered under restrictions in the wealthy Jiang family, yet was obsessed with repairing and disassembling cars. Real daughter Lin Wanwan returns, and Jiang Yu feels relieved, joyfully returning to her biological parents' auto repair shop in the Northeast to freely be herself. Genius younger brother Jiang Chi hires her with five million to return to the Jiang family as a mascot, and she resolves misunderstandings and disputes with her transparent and open-minded attitude. Relying on her hard-core car repair skills, Jiang Yu helps the disheartened racing champion Lu Ye return to his peak, and also leads the family to carve out their own career in the old street. Both families finally achieve fulfillment, with each getting what they desire.