Su Yunjin (Liu Yifei), who looks gentle and quiet, slowly falls in love with her high school classmate Cheng Zheng (Wu Yifan) under his affectionate pursuit. However, it is easier to fall in love than to get along with each other. The differences in living environment and personality since childhood have become problems between the two. The constant discovery of contradictions eventually caused cracks in their relationship and finally led to a breakup. A few years later, Su Yunjin became a successful career woman, but her peaceful life was disturbed by the reappearance of Cheng Zheng. The tangled relationship between the two prompted them to get entangled again, and only then did they realize that they had not let go of each other in the past few years. They wanted to love but were afraid of the past repeating itself...