Yue Yong was killed by his lover of 8 years. When he opened his eyes, he went back to two years ago. He was determined to know the reason for killing him, but he didn't know that his lover had changed a long time ago. The young middle school teacher Jiang Zhongxuan had a twin brother who was adopted by different families and never heard from again. Years later, he met his brother when he was terminally ill. He asked his brother to pretend to be him to take care of his lover for a period of time and then break up naturally to prevent the lover from being too sad. Unexpectedly, one day his younger brother said to him: "I seem to have really fallen in love with Yue Yong. From now on, he can only love me, Fan Lu, not Jiang Zhongxuan."