Kim Seok Joo (Kim Myung Min) is a cold and successful lawyer who goes by the book. His normal life is disrupted when a serious accident erases his memory. The effects of the accident cause him to go against his old law firm, where not everyone plays fair.This drama portrays the lawyer trying to discover who he really is. Lee Ji Yoon (Park Min Young) is an intern at the law firm who works directly under him. Meanwhile, Yoo Jeong Seon (Chae Jung Ahn) is his fiance. She is the only grandchild of a wealthy family. Cha Young Ho (Kim Sang Joong) is the CEO of the lawyer firm whom had molded Kim Seok Joo to be an ace lawyer through his connections and teachings..