Phantom Detective" is about a detective named Hong Gil-dong who has a 99% case record and is more notorious than the evil villains. He sets off to find an enemy from 20 years ago and faces a scheme he's never thought of before. Lee Je-hoon is Hong Gil-dong from an illegal private agency, Kim Seong-gyoon is Kang Seong-il, the mastermind behind Gwangeunhwe, Ko Ah-ra is Chairwoman Hwang who owns Hwalbin Foundation and other casts include, Park Geun-hyeong, Jeong Seong-hwa and more.
Hong Gil-dong doesn't feel. He even threatens young children and this might come off as disturbing at first butLee Je-hoon re-created him.