A bittersweet romantic comedy about a job seeker who suddenly gets stuck in time as an old-ager one day, and an extraordinary internship with a prosecutor who is caught up in her all day and night.

Ok Da-Jung is the youngest team leader in the cosmetics industry. She has divorced three times so far. She doesn't care what others think about her and she also has quite a temper. Nam Jung-Gi works as a section chief at the same cosmetics company as Ok Da-Jung. Unlike her, Nam Jung-Gi has a timid and nice personality. He can't say anything that makes others uncomfortable. He is able to make Ok Da-Jung's blood boil.