Shen Yanzhi has been in love with Su Wantang for ten whole years. He has proposed to her countless times, only to be repeatedly challenged with advanced mathematics problems and criticized for his mediocre talent. Her constant belittlement gradually exhausted all the love in his heart. Disheartened, he left for a life abroad, where he met Qiao Yining, a woman who appreciated him, and built a happy little family with her. Five years later, he returned to China with his wife, an academician, to attend an academic conference, where he unexpectedly reunited with Su Wantang. But the passionate feelings of the past had long since faded. The problem that once stood between them represented more than just a gap in academic ability; it also separated two hearts that had once sincerely reached for each other. Some missed chances can never be reclaimed.