When ten-year-old Lu Shiyu is kidnapped, he escapes but is rescued by a young girl, Lin Nian'an. While protecting him, Nian'an is pushed down by the criminals and hits a box, leaving her with an old wrist injury. Lu Shiyu leaves his watch with her, promising to return and retrieve it someday. Ten years later, Lu Shiyu has become the president of a major corporation. He returns to find his lifesaver, but his aunt, Zhou Huilan, has her own daughter, Zhou Yuwei, falsely claim to be the girl who saved him. Bound by their past kindness, Nian'an chooses to endure the injustice in silence, while Lu Shiyu gradually discovers inconsistencies as they spend time together. After a thorough investigation, the truth finally comes to light, and the misunderstandings of the past are completely resolved. Having overcome countless obstacles, the two finally confess their feelings and find their way to a warm and happy ending.