After a chance encounter in LA, two teens from different social backgrounds reunite at an exclusive high school attended by Korea's über rich.
Kang Geum Hwa quit her job after getting married and having a daughter. Uncomplaining and trusting, she tries her best to make a happy home for her family. But when she learns that her husband Go Kyung Se is having an affair, she divorces him. Initially miserable, Geum Hwa undergoes a makeover. Now confident and attractive, she is ready to start a new life with her daughter. Her Ex-husband, Kyung Se, the president of advertising company Sweet Rain, remarries. Eventually, he comes to the realization of how important Geum Hwa is to him, and wants her back. But his new wife Wang Se Mi isn't going to let him go without a fight.
The story takes place in Seoul, 2011. Lee Yoon-sung is a talented MIT-graduate who's working on the international communications team at the Blue House. He encounters dangerous situations while solving a variety of cases, both big and small, for people who need his help, and eventually becomes a "city hunter."
A series of misunderstandings and unfortunate events conspire to shatter the once-promising life of girl from an affluent family.