Lee Jin-soo made it big after writing several thriller novels and establishing himself as a talented novelist. He works for Seo Eun-young, the owner of the biggest publishing company in Korea, and has a long-time friendship with her. Jin-soo has many fans, especially female, and he seems to be the perfect match for any woman... but what no one knows is that he is actually a bit weird and sarcastic, has many strange habits, and holds a dark secret. His secretary, Kang Seung-yeon, has to cope with him and his habits. She begged him for this job to become a pro instead of the below-average girl that she really is. On top of that, there is also the return of Han Ji-won, Eun-young's ex-fiancé, whom she despises. Ji-won tries to win Eun-young back, but she has her eyes set on Jin-soo.
Coffee House is one of the most watched South Korean dramas on Chinese video streaming platform Youku with over 10,000,000 views and an average of 500,000 views per episode (As of November 2015).[5]