After the statute of limitation expires on the murder he has committed, Lee Du-seok publishes an autobiography describing all his murder in great detail. Detective Choi, who investigated Lee's murder 15 year ago starts the chase once again and Han Ji-soo, who lost her daughter to Lee, pledges vengeance. Meanwhile, another killer appear, casting doubt to whether Lee is the real serial killer. The key here is how well the story juggles the truth and how solid the description of the character' tangled relationhips is.