Jin-u can memorize enormous volumes of diverse information. One day his father was unjustly condemned, and in order to restore his good name, Jin-u finishes the Faculty of Law and becomes a lawyer. But after a very short period of time, the young man's abilities suddenly disappear. The young man has a childhood girlfriend, LiIn-a; she also studies law. She knew Jin-u's father as a very decent man who is absolutely incapable of committing a crime. Together they try to restore justice.