28-year old Liang Xia (Ni Ni) and 30 year-old Mao Liang (Wallace Huo) has been together for 10 years, and living together for 5 years. Liang Xia puts a lot of emphasis on appearance and dreams of a perfect wedding, wedging a distance in her relationship. To prepare for every aspect of the wedding, she enters a phase of premarital crisis. Mao Liang, on the other hand, is preoccupied with work and cares nothing about wedding preparations. He gradually sees the wedding as a nuisance and initiates a breakup with Liang Xia. The devastated Liang Xia eats a magical chocolate, transporting her memory back to her 17-year old self. Without the worries of adulthood, our heroine is back to her naive, optimistic self and that triggers a surge of interest in Mao Liang, who she now refers to as “Uncle”. Things turn even more complicated when Liang Xia’s first love, Yan Yan (Darren Wang) comes back into the picture.