Buddies Meng Yun and Yu Fei break up with their girlfriends and indulge themselves in living the bachelor lifestyle again. However, as their ex-girlfriends reemerge in their lives, their “Single Plan” starts to unravel!

马天泽（欧豪 饰）和夏沫（曾梦雪 饰）是一对在大城市打拼的情侣。相恋3年的他们面对种种现实问题，最终没能走进婚姻的殿堂。热恋中他们曾列下“分手清单”，约定只有完成清单上稀奇古怪的内容才能分手。分手倒计时，在执行清单的过程中，两人回顾了3年的感情和各自的成长打拼经历，他们的清单任务还能继续下去吗？

A genius girl and her childhood sweetheart navigate life's challenges from campus to marriage in this heartwarming coming-of-age story filled with wit, warmth and youthful passion.