I mean, the main antagonist is indeed a serial killer, so why not? It was more like a political drama with some action thriller. The cast was well-chosen and I have no complaints about their acting. I am still not sure what role the CIA plays in the movie. Why are they involved?

Lee Jong Suk's characters have surprisingly few lines throughout the film. I heard he is really shy in real life, but villainous characters really suit him, to be honest. Looking forward to seeing him playing more challenging characters in the future.

I would recommend this film if you prefer something dark and twisted. Happy watching.