Lee Jin Soo is a master at writing thriller novels that become national bestsellers. He also knows how to make his public persona appear sweet, eclectic and humorous. But his boss, the publishing company owner Eun Young, and his barista-turned-secretary Seung Yeon know him best for the acerbic and peculiar man that he is. When Eun Young’s annoying ex-fiancé comes back to try to win her back, she teams up with Jin Soo to try to get rid of him. But will Seung Yeon let the pair get too chummy?