Jill Grace had never expected that she would be pregnant with the father unknown. However, it did happen to her. While she was considering how to deal with the baby, a man came to her and took her to a large, palace-like villa. She thought the man should be her baby's father, and he would definitely appear once she gave birth. However, the man never showed up but took the new-born baby away. Jill was then exiled from the deadly beautiful house. Years later, when she occasionally saved the president's son from a car accident, the boy was so glad that he continued following her and calling her mommy. The president then suddenly proposed to sign a contract marriage with her. Should she agree? What's the truth?