When he was young, Li Dong (Zhang Luyi) had a crush on a woman named Achuan (Ni Ni), but one day Achuan's sudden disappearance became a knot in his heart that he could not untie for more than ten years. In order to relieve his longing, Li Dong and his brother Li Chun (Xin Baiqing) went to Liuchuan, which has the same name as Achuan, just to see her again. As they met again, the truth of many past stories surfaced, and Li Dong also learned the real reason why Achuan left that year. However, his deep love for Achuan became more and more intense in this affectionate confession in "her" hometown...