The ordinary-looking and cheerful Li Ting Ying stood out in Gold Express's Guan Peisheng exam, but was appointed by the boss as a courier for three months. At the same time, sound engineer Li Xin erroneously "destroyed" the ordinary Li Ting Ting's wedding, causing his fiance Cheng Wei to regret his marriage. All this stems from another person named Li Ting Ting. She is an ordinary classmate of Li Ting Ting's middle school. She is prettier and more beautiful than her. She is the "shadow" of her adolescence. Now she has become a colleague with her. In order to make up for the mistakes he made, Li Xin developed a wonderful relationship with ordinary Li Ting Ting and also helped Li Ting Ting out of the crush of love and adolescence.