Yang Yifan, a fresh graduate, becomes an intern at an advertising company, but unexpectedly discovers that her ex-boyfriend Huang Yuchen is the one competing with her for a permanent position. Huang Yuchen doesn't want to break up with Yang Yifan, so he applies to be Yang Yifan's colleague to help her get a permanent position, hoping to win back his girlfriend's heart. After a period of hard work in the workplace, Huang Yuchen gradually understands the reason why Yang Yifan broke up with him, because he lost himself and his true respect for his girlfriend, so he decides to take this job seriously and become a real competitor. Yang Yifan sees the change in Huang Yuchen, and finally makes her start to re-examine this relationship.