When Kim Hee Woo was a high school student, his academic grades ranked at the bottom of his school. Through hard work, Kim Hee Woo entered a university and eventually passed the bar exam. He now works as an enthusiastic prosecutor. While he investigates possible corruption related to a politician named Jo Tae Sub, he gets killed by an unidentified man. However, Kim Hee Woo wakes up and finds himself alive again.