Nancy is a sixteen-year-old ordinary Chinese girl with a cheerful personality and proficient in spoken English, but her English scores are average. She loved his family, loved her friends, loved everything she had, and although she was an only child, she thought she was happy. One day, darkness fell on her and conquered the entire universe. In order to study the memory of humans on earth, the Forgetting Organization chose the memory of the girl Nancy as a sample for experimental research. Nancy, who has lost her memory, comes to the Eden family, the only family on earth that has contact with the Forgetful Organization. What makes Nancy, who has nothing, bravely survive? How will the Eden family treat this unfortunate girl? How did Nancy meet her true love? Stay tuned.