Han Yeo-Reum (Choi Gang-Hee) is a radio program writer. She was popular when she was younger, but she is now an ordinary 37-year-old woman and lonely. She has an uncomfortable relationship with her coworker PD Oh Je-Hoon (Tae In-Ho). They have feelings for each other, but they do not develop a relationship. Han Yeo-Reum then casts Park Hae-Joon (Lee Joon-Hyuk) for a program. She is her ex-boyfriend and a pop music columnist.
Man-ho is a pacemaker for Korean national marathon team. His purpose is to stay ahead of others until the 30km mark. But he gradually grows a desire to run for the victory.
Mu Myeong is a Joseon dynasty headhunter who meets and falls in love with lady Ja Yeong who will become the future Empress Myseongseong. A few years later, Ja Yeong enters the royal palace to marry King Gojong. Mu Myeong still having feelings for Ja Yeong and in an attempt to get closer to her becomes her personal body guard.
