There’s no actual serial killer-catching or mystery solving here until the last few episodes. The main villain, the male lead’s father, is already dead when the story starts. He had an accomplice working with him but this person does not play an active role until the last few episodes. The story mostly deals with the male lead Hyeon-su, and his trauma about his past and how he copes with it. This isn’t a bad premise and I think that exploring the stigma that children of serial killers encounter could be interesting, but they don’t really get into this.

I was confused about what the story was trying to say. Was it trying to say that children of serial killers could somehow inherit a psychopathic gene or that, when bullied by their communities, could eventually become psychopaths themselves? I get that a bunch of narrow-minded people mistreated Hyeon-su and his sister but it was a little unbelievable to me that not one person outside their community (not one person in the city, or even one doctor or person of science) thought he was innocent when there was really nothing to tie him to any of his father’s murders, other than the fact that he was this evil guy’s son.

Hyeon-su was so convinced that he could not feel any emotions and could not care about anyone…if so, why did he take the blame for what his sister did? If he was traumatized by the experience (if one can feel trauma then doesn't that mean he/she has feelings?) and became a ‘psychopath’, how come his sister wasn’t similarly affected? I don’t understand why he could suddenly see these visions of their father when his sister couldn’t . Given that SHE was the one who actually killed someone, why wasn’t she suffering and as traumatized as he was?

When he meets the female lead Jin-ha, he doesn’t really care about her, but decides to enter into a relationship because being with her made his ‘visions go away.’ Why did she have this effect on him if he didn’t have any feelings for her to begin with?

Later, it was pointed out how clumsy the killer’s accomplice (the ’second killer’) was and yet, nobody could tell what he looked like or find any clue about him. Also, the actor playing him was so over-the-top and deranged that even a blind man could have spotted him. The only person who met him in the past was Hyeon-su’s sister, Hyeon-ha…and yet she had to take hypnotherapy to remember him. In her hypnotherapy session, she still couldn't remember what he looked like because he was wearing a hat* in their father’s funeral.

A hat, not any kind of facial covering.

I don’t get why Hyeon-su later decided to take on the identity of a rich man’s son. This rich man’s son (Baek Hee Song) was in a coma, but was technically still alive, so what he did was completely unethical. Also, not one of them even considered what would happen if this guy woke up. Why didn’t Hyeon-su just do a Jean Valjean and assume a brand new identity with false papers?

The female lead, Jin-ha, had an unconditional love for Hyeon-su, which I normally would have appreciated but she crossed a line both legally and unprofessionally when she burned evidence that could be used against him. She was convinced he was innocent and that the investigation would clear him, so why did she have to do that? After talking to Hyeon-ha (who wanted to confess at this point), she insists that nothing be revealed. What kind of decent cop would insist that someone take the blame for another’s crime? When her detective squad discover that Baek Hee Song and Hyeon-su (the guy they’ve been looking for) are the same person and that she had been lying to them, instead of suspending her for a bit because she was personally connected to the case, they decide to believe in both of them and let them continue…based on nothing. In fact, the reporter working with the male and female lead who was once forcibly tied up and kept in their basement for a few days suddenly develops Stockholm syndrome and becomes a loyal friend to them.

One of the serial-killer-duo’s victims is a woman named Jung Mi Sook. For some reason, they decide not to kill her and predictably, she reappears later to add more drama. During all this time, she somehow ended up imprisoned by a human trafficking group. This group had no connection to the story whatsoever but they forced it in by making this gang have ties with the rich old couple and the second killer...who conveniently turned out to be Baek Hee Song! This means that by taking his identity, Hyeon-su got himself into deeper trouble..but it’s nicely resolved in the end because he has a lot of plot armor. Also, the rich couple try to get rid of Hyeon-su using this trafficking group.

One of the last dramas I watched had a man get up miraculously from a wheelchair. It also happens here, but the difference is that the real Baek Hee Song had been in a coma for more than 10 years and had not used his legs/muscles. How could he not only get up but outrun someone instantly? How can a maid, who was hired by the Hee Song's because she was deaf, suddenly hear and tell what is going on? It also turns out that Baek Hee Song killed his mentor, the main villain and the original serial killer, by bashing him in the back of the head. For some reason, people conclude that he committed suicide but how does one do that by getting smashed from the back?

The story actually ends at episode 15 but they decide to extend it by giving Hyeon-su amnesia. This is not a trope I care for, but some of the dramas I like have had it, so it was not a deal breaker. In here, they added it to prolong Jin-ha’s suffering over Hyeon-su, as if he didn’t have enough baggage to give her. He also spends 15 minutes crying in a self pitying mess over the fact that he ‘can’t have emotions.'

The reason I gave this drama a higher rating is because the actors Lee Joon Gi and Moon Chai Won performed well..but that’s it. It lacked more logic than anything I have ever seen before.