In order to raise her brother's huge medical expenses, the heroine Su Wan was forced to sign a one-year marriage agreement with the indifferent billionaire CEO Li Min. In the Li family, she was regarded as a money-worshiping girl who clung to the powerful, and she was treated with cold eyes and made things difficult for her. However, no one knew that this seemingly weak and bullied girl was actually the legendary futures trader codenamed "Nightingale" who made waves in the financial world.