Shin Do Young is an announcer who instigates the jealously of all women around her because of her superior looks, great abilities, and great background. But Do Young has a deep, dark secret. She was actually abandoned at an orphanage when she was young but luckily she was adopted by a nice couple. The couple were unable to have their own children but were surprised when their biological daughter was born. Do Young, afraid that her parents would no longer love her anymore abandoned her 5 year old little sister, Ji Young, at a train station. Years have passed and Do Young meets a joyful girl, Sa Wol, who becomes her personal shopper. What happens when Do Young's terrible misdeed is revealed and that Sa Wol is actually the sister she abandoned at the train station all those years ago?

Lee Jung Do's father is a swindler and intends to resume his old habits as soon as he got out of prison even though he has promised his son to go straight. Because of his father's record, LJD had a hard time finding jobs but he overcomes these obstacles, passes law exams, and becomes a prosecutor. Oh Young Joo is a detective and her precinct is in LJD's neighborhood. Kim Joon Ki who comes from a well off family is also keen to become a prosecutor. He meets OYJ through a blind date and has continued to pursue her even though she isn't interested. Moon Chae Ri is a small time swindler who hooks up with LJD's dad in his plan to do one last job before fulfilling his promise to his son to stay out of trouble.

Yoo Eun Ho (Son Yeh Jin), an instructor at a fitness club divorced her husband Lee Dong Gin (Kam Woo Sung) after the death of their new born baby as she blamed him for not being there for her when she needed him most. They remained friends after the divorce and met regularly. Even though both started seeing other people, they still had great feelings towards each other. With the help of YEH's sister Yoo Ji Ho (Lee Ha Na) and LDG's friend, Dr. Gong Jeon pyo (Gong Hyeong Gin), they finally realized that they should get back together.