Bang Myeong Su, a famous webtoon writer, creates a hit series based on his past relationships, featuring four ex-girlfriends—including an older divorcee, a savvy investor, and a struggling actress. The webtoon becomes a sensation and sparks a film adaptation, turning Myeong Su into both a heartthrob and a controversial figure.

Film producer Kim Su Jin, eager to save her failing company, agrees to adapt the webtoon—only to realize Myeong Su is her ex, and she’s one of the women in the story. As production kicks off, all of Myeong Su’s exes return, stirring up chaos both on and off set.