A dodgy police officer suddenly takes a different path when he develops a split personality as a result of trauma from his past. The main theme running through the series is a serial killer who has links with the detective from his childhood. The detective is played by Lee Dong-Wook who always does an excellent job and the supporting cast are all well played. I was particularly impressed with the excellent performance of Kim Hieora who plays the head of a drug syndicate and holds your attention when she is on screen and I would have liked her story expanded. It is an interesting concept but I think they slightly got the balance wrong between the humour and the gruesome murders although it is worth a watch.