Lan Feichi, played by Liu Shuailiang, is a poor student who performs exceptionally well and is admitted to a key university in Beijing. However, his girlfriend Qi Shu (played by Ayi Pali), a top student, gives up her homework for him and ends up in a local third-tier university. Many years later, the two meet at Qi Shu's wedding. Lan Feichi, feeling guilty, travels back to his school days in a magical watch shop to change their fate and tries to change the past...