Seven-year-old Gu Yi was taken home by a married couple from the border between two cities. Eight-year-old Xu Gubei suddenly had a little sister whose origins were unknown.
One day, when Xu Gubei was twelve, he came home late and found that the girl who used to chase after him, calling him "big brother," was nowhere to be seen. He felt inexplicably downcast.
As a child, he thought it was just a habit. As he slowly grew older, he realized something had taken root in his heart a long time ago, and it had begun to sprout along with him.
At nineteen, Xu Gubei met Gu Yi again at university, only to discover that she had long since forgotten him.
At twenty-two, Gu Yi left China once more, leaving Xu Gubei behind. This time she left him nothing, not even a keepsake. She even told him not to bother her again.
At twenty-six, Xu Gubei was driving home when he saw a girl whose profile looked very much like Gu Yi's. The mature and composed Xu Gubei followed her all the way home, then sat in his car, lost in thought.
Theme: For the person you love, no obstacle is too great.
