For Yi Ru: Fu Yihua was her childhood love, which made her go away from home and refuse love for many years to come;
For Fu Yihua: Yiru was the woman he swore to love forever, but in the end it was him who hurt her the most.
For Xu Cheng: leaving Yiru was the worst decision he made that year and the biggest regret in his life.
When everything returns to the starting point, when old love meets Lan Yan...