Woo Yi Kyung (Lee Soo Kyung) worked at a law firm as a secretary when she fell in love with Byun Hyuk (Ryu Soo Young), a rising star attorney in the firm. They lived together for a year before he left for America with no explanation. Six Years later Yi Kyung ends up becoming a lawyer herself and opens her own office.
Her first paying case is to represent Han Min Gook (Lee Sung Jae) in an alimony lawsuit that could cost him $100 billion Won. Han Min Gook's ex-wife, Lee Ae Ri (Han Eun Jung), is Yi Kyung's good friend, and the lawyer representing Ae Ri is none other than Byun Hyuk himself who has returned from America determined to win Yi Kyung back. Yi Kyung is facing a showdown with her friend, Ae Ri, as well as her first love, Byun Hyuk, all while falling for her client Min Gook.