Qiyue (played by Ma Sichun) and Ansheng (played by Zhou Dongyu) first met at the age of thirteen. One of them was a maverick and domineering "wild child", and the other was a simple, gentle and obedient "good girl". From that year on, Qiyue and Ansheng were almost inseparable. She was her light and she was her shadow. Until one day, a teenager named Su Jiaming (played by Li Chengbin) appeared beside Qiyue, and Qiyue fell in love. Ansheng decided to go to Beijing to make a living. Before leaving, Qiyue accidentally discovered that the jade pendant that Su Jiaming carried with him appeared in Ansheng's collar. Ansheng left, and Qiyue and Su Jiaming's relationship continued. They were admitted to the same university and agreed to get married as soon as they graduated. However, things did not develop as Qiyue imagined, and the relationship between her and Su Jiaming also produced new variables because of Ansheng's return.