A story of a young prosecutor who has suffered a new opportunity to realize justice again. Adapted from a web novel of the same name. When Kim Hee-Woo (Lee Joon-Gi) 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 is investigates possible corruption related to a politician named Jo Tae-Seob (Lee Kyoung-Young), he gets killed by an unidentified men. But, Kim Hee-Woo wakes up and finds himself alive again.