Daehyun, a college student who works part-time at a coffee shop, is content with her life. Her boss Jihan owns the cafe, and his sister Ari is obsessed with K-pop idols. Meanwhile, 21-year-old Kim Buell, a lead dancer in the group Angels, looks exactly like Daehyun. Her contract is about to expire and her CEO dislikes her. To regain popularity, Buell participates in a dating reality show with famous Idol Jungwoo despite suffering from anxiety and depression. Later, De Yoon delivers coffee to Buell's company and is surprised by their resemblance.