In the souvenir room of a high school in a rural area. Phuong Anh. A 12th grade student is attentively looking at an old photo in the school's scrapbook, that photo brings up a girl with a face similar to Phuong Anh. She discovered this 3 years ago when she was just a 10th grade girl who had just been admitted to the school. From that day on, Phuong Anh often had a dream. That dream repeated many times, she remembered everything that happened in that dream. In the dream, she saw the girl with a face similar to hers with a boy. They played happily together. But when Giaiacs dreamed, she was always a girl leaving the boy alone. Many times, Phuong Anh tried to change the dream to have a different ending, but she still couldn't make that ending. From that day, Phuong Anh also discovered who the girl in the photo was? What was the relationship between her and her? But in vain. Besides the information that the girl was Luu Phuong Lan. A very good student. She graduated 10 years ago. Suddenly, a violin sound came from the music room near the memorial room, interrupting Phuong Anh's train of thought. The music of "Serenade of Franz Schubert" sounded in the afternoon, making the atmosphere even sadder. What surprised Phuong Anh was not the song but the violin. Phuong Anh knew that besides her, no one in this school learned this violin because it was a pretty good instrument in this countryside. Phuong Anh quickly folded the yearbook, put it in the right place, then gently left the memorial room and went to the music room. She did not enter but gently looked through the open window. She saw a young man about 27 - 28 years old, playing the violin passionately. What surprised Phuong Anh was that the young man was the young man she had always met in her dreams.