Yierpi and Li Mobai grew up together as childhood sweethearts. Yierpi has always been secretly in love with Li Mobai, but Li Mobai has always liked his high school classmate Lin Sa. The two hit it off for a time. Later, after graduating from college, Lin Sa went abroad to study for the future, and the two broke up. Yierpi has always been by Li Mobai's side, spending time with family and friends. With the help of Li Mobai, one day Li Mobai finally nodded and asked Yi Yi to be his girlfriend, and the two discussed marriage. At this time, Lin Sa suddenly came back and asked Li Mobai for forgiveness. The two rekindled their old relationship. However, Li Mobai was a man with a heavy sense of responsibility. For the sake of responsibility, he could only give up Lin Sa and fulfill the engagement to marry Yi Yi. And Yierqi knew that Li Mobai still loved Lin Sa, but he had to marry him because of responsibility. Yierqi loved Li Mobai too much, and because she loved him, she couldn't bear to embarrass him and see him in pain, so she took the initiative to terminate the engagement and let him go free... And what should Elqi himself do? At this time, where should Yi Erqi go? Should she continue to watch for a love that does not belong to her, or should she let go completely and look for new hope...