Former lawyer Ku Do Han investigates unsolved crimes, piecing together clues from current cases. He's joined by reporter Cheon Na Yeon and con artist No Sang Cheon as they unravel the truth and seek justice.

Ku Do Han, a former lawyer turned detective, is on a quest to uncover the truth behind an unsolved crime from the past. He investigates current cases to piece together clues to find the perpetrator. Along his journey, he encounters Cheon Na Yeon, an eager reporter, and No Sang Cheon, a con artist. Together, they work to unravel the truth and bring justice to the case.