Taipei comics artist Yang Chunchun (played by Ying Caier) frequently encounters bad relationships on the road of love, and the sales of her works are declining. Yang's father asked Chunchun to accompany him back to the mainland to see the Great Wall, but was rejected by his daughter. Unexpectedly, Yang's father died of an acute illness when he went to Jiayuguan alone. On his deathbed, Yang's father asked Chunchun to find his first love Xiuqian in the mainland. Chunchun suspected that her father had married in the mainland and had done something sorry for her mother, so she decided to return to her hometown to find out. At this time, Fang Mingdi (played by Tong Dawei), a private detective that Yang's father met on the train before his death, was entrusted by Yang's mother to serve as a guide for Chunchun. The two people with different personalities started to argue as soon as they met, but they had to go together due to the reality. In Yang's father's hometown under Yanmen Pass, the two found out that Xiuqian married far away in Yinchuan. They continued to move forward in search of Yang's father's former love, and a new love happened between them...