One day, Professor Jang, a music professor, receives an international call from the U.S. Eight years ago, Professor Jang went to a seminar in America. He met a woman by chance. Her friend is calling to tell him that the woman died in a car accident, leaving behind a seven-year-old son. Intuitively, Professor Jang knows that the child is his son. This breaks up his family. Professor Jang goes to America and sees seven-year-old Jun. He regards him with amazement. However, he doesn't tell Jun that he is his son.