There are dramas with quick paced screenplay. Then there's this one. It felt as if everything occurred within the span of a couple of days. There is no cool off period between one case to the other or the main overarching case involving the two leads. This high velocity bound to create some blatant omissions and put a dent in logics. Unfortunately the omissions and lack of logic were not really easy to look away.

Character with superhuman powers is not something that is new to Korean Dramas. But it is unusual to find one in which the powers are not well defined and used casually to make up for lazy writing. The ability bestowed upon the character by the writers were not overused. Yes, the stories were bent to suit the power but they did not seem forceful at any point.
The other lead, a tortured police officer on the path of vengeance might come off as a little irritable and at times getting on the nerves of the viewers. But he served as a symbol of defiance against a hierarchical system mired in corruption, bureaucracy and lethargy.

Different cases handled by the team, individually, had a nail biting screenplay and/or exuberant pathos. The evil in each of the cases were progressively diabolical from one to the other. So the victims needed to be really powerless and their weakness was written really well by amplifying the dementedness of the bad guy/s.

It is because of this very reason the main big bad of the show seems weak with a cluster of cliched psychopathic tropes amped up by dark biblical and literary references. He is neither astute nor enigmatic. There is nothing remotely engrossing or even likable about him. A flawed attempt at writing a character with flaws.

This show has the one of the most alluring cinematography and elevating music with nice balance of sound designing. Some of the shots transcended the screen to show pure evil while the music just enhances the experience. Since this show is more about the minute sounds, there needs to be an amplification of the same during a tense situation along with background music. It had its fair share of appropriate scoring with the congruent noises enhanced.

A show need not picturize all the events in a particular arc or phase of the story. Some of those would be obvious and it is subconsciously understood by the viewer. But here, they have ignored including some scenes assuming those fall into the above category. It is really difficult to conclude how the characters came upon that clue or a particular revelation. The chain linking it all seemed to have forgotten to include a few things. Adding to this some logical errors, it causes a massive harm to an otherwise decent thriller.

The flow of a good thriller with immersive cinematography and chilling sound design and music were interrupted sporadically by these errors which are not negligible enough.