Sunwoo In Young (Jo Yeo Jung) has been dating the same man for the past 10 years and, at 33 years old, is waiting for the big question. When she finds out he's cheated on her, she flat out breaks up with him, determined to continue her life. At the same time, her best friends Park Seo Yeon (Choi Yeo Jin) and Kang Hyun Joo (Choi Song Hyeon) face their own relationship problems. A sex-and-the-city style story about three woman who face the ups and downs of being career minded at an age where society expects them to be married.