After five years together, on the very day they are supposed to register their marriage, Shen Jiahe abandons her fiancé, Xu Zhixing, just as they are about to sign the papers, rushing to the scene of a sudden car accident involving her childhood friend, Lu Xiao. Time and again, she puts her friend first, exhausting all of Xu Zhixing's hopes. He decides to move away and start a new life elsewhere. When Shen Jiahe finally sees through Lu Xiao's selfish motives and realizes her mistakes, she tries desperately to win Xu Zhixing back, only to discover that his love has already faded through countless moments of waiting. In the end, they both let go of the past, grow independently, and pursue their own futures.