A psychological mystery thriller that tells the story of things which lose their meaning when greed and power comes into play.

It tells an unpredictable 24-hour love story of the four-dimensional innocent girl Jung Saet Byeol who was once a troublemaker and the adorkable caring male store manager, Choi Dae Hyun, in the context of a convenience store. They have met each other accidentally 4 years ago, back then Saet Byeol asked Dae Hyun to buy cigarettes for them. Until now, Saet Byeol comes to the convenience store Dae Hyun runs for a part-time job, their hilarious romantic story starts.

Cha Eun Ho is a genius writer and the youngest chief editor ever at his publishing company. He is smart and handsome. He is also even tempered at work, but he has a warm heart and a reasonable personality. Kang Da Ni used to be a popular copywriter, but she is not anymore. She is now broke and unemployed. Even though she tries to find a job, due to her impressive career and excellent educational background, she is unable to find a new job. Finally, Kang Da Ni gets a job at a publishing company by lying about her background. Cha Eun Ho is the chief editor at that publishing company. They begin to develop romantic feelings for each other.