It’s true that fiction is often based on fact. Bang Myeong Soo (Byun Yo Han) is a webtoon writer who has used his own personal experiences with his ex-girlfriends as source material for his popular webcomic. In fact, he has gone into great detail about the personalities and idiosyncrasies of all the women he has dated. When his webcomic is optioned to be made into a film, the producer assigned to the project at the film production company happens to be Kim Soo Jin (Song Ji Hyo), his most-recent ex-girlfriend. When the project requires that Soo Jin also gather Myeong Soo’s other ex-girlfriends – Jang Hwa Young (Lee Yoon Ji), Na Ji Ah (Jang Ji Eun) and Ra Ra (Hwa Young) – does the film project stand a chance at getting off the ground?