By chance, university professor Zheng Zhiyou (Kim Sang-hyun) met the model Yin Zhiyou (Kim Hyo-jin). He was amazed by Yin Zhiyou's temperament and beauty, and Zheng Zhiyou decided to invite Yin Zhiyou to be his model. With the student Xizhen (Xu Xianzhen), the three came to the beach and accidentally learned about a relationship that Yin Zhiyou had experienced. Two years ago, Yin Zhiyou lived in the darkness where she could not see any future and hope. In despair, she thought of death, but in the process of seeking death, she met a pickpocket named Jiang Zhiyou (Jin Huayu). As time went by, ambiguous feelings gradually developed between the two girls. The lively and alert Jiang Zhiyou made Yin Zhiyou find a reason to continue living. However, unlike Yin Zhiyou, Jiang Zhiyou is very sensitive and alert to love, while Yin Zhiyou is fully devoted to love. Over time, the relationship between the two has cracked.