In the early of 1970s, a promising statesman, Kim Do-joon, had a secret love affair with Choi Mi-ran, a college woman with beauty and intelligence. At last, she gave birth to a boy, Choi Dong-min, the son of Kim, Do-joon and Do-joon who really loved Mi-ran took care of her.
After long years, Dong-min graduated from a junior high school. One day, Dong-min and his friends raised at the same orphanage fought with the other gangs during they picked pockets. At the fight, one of Dong-min’s friend, Myung-chul, became a disabled man and Dong-min was arrested for his riotous behavior. At a jail, Dong-min met the public prosecutor, Min Seung-joon and this meeting made Dong-min decided to be a righteous prosecutor.
From that time one, reformed Dong-min studied hard to be a prosecutor and then he became a righteous prosecutor after years of intense application.