Kim Sam-soon (Kim Sun-a) is loud and brash, yet insecure about her weight. She has always been embarrassed by her old-fashioned first name, and nearing her 30th birthday, she dreams of changing it. She is an excellent baker with a fervent passion for making desserts. On Christmas Eve, Sam-soon gets dumped by her cheating boyfriend (Lee Kyu-han) and loses her job. One of the witnesses to her public humiliation is Hyun Jin-heon (Hyun Bin), the owner of upscale French restaurant Bon Appetit. Upon recognizing her talent, Jin-heon hires her as Bon Appetit's new pastry chef. From their first meeting, the two have an antagonistic relationship (she calls him the equally old-fashioned "Sam-shik"), and sparks fly.