Li Xing and He Qiao Qiao are childhood lovers, upon reaching graduation from university Li Xing proposes to Qiao Qiao. She refuses to marry him on the grounds that he is not marriage material. They come to the conclusion to make a contract that, if after 5 years they are still single they'll get together again. Qiao Qiao fully expected Li Xing to wait for her but she receives a phone call inviting her to Li Xing's wedding. Will she be able to get him back?